Ford F-150 2WD (1986) Workshop Manual

Factory Workshop Manual

Ford

F 150 2wd Pickup

V8-351 5.8L (1986)

Anonymous

1st January 2018

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Model

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Date

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by System > A L L Diagnostic Trouble Codes ­Engine Controls > System Information > System Diagnosis > Transmisson Codes

A L L Diagnostic Trouble Codes - Engine Controls: Testing and Inspection Transmisson Codes
For Transmission related codes, proceed to Computers and Control Systems.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > A L L Diagnostic Trouble Codes ( DTC ) > Codes by System > A L L Diagnostic Trouble Codes ­Trans and Drivetrain > System Information > System Diagnosis

A L L Diagnostic Trouble Codes - Trans and Drivetrain: Testing and Inspection
For Transmission related codes, proceed to Computers and Control Systems.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module >
Component Information > Locations

Cruise Control Module: Locations
Underneath LH Side Of I/P
Behind I/P, To Right Of Steering Column

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Cruise Control > Cruise Control Module >
Component Information > Locations > Page 16

Cruise Control Module: Testing and Inspection
Use only a multi-meter of 5000 ohm/volt rating or higher when performing amplifier test.
``On'' Circuit Test

1. Turn ignition ``On.''

2. Connect a voltmeter between light blue wire w/black hash and ground on models exc. 1983-87
Ranger, 1984-87 Bronco II and 1986-87 Aerostar or white wire w/purple stripe and ground on
1983-87 Ranger, 1984-87 Bronco II and 1986-87 Aerostar.

3. Battery voltage should be indicated when ``On'' switch on steering column is depressed and
held. If battery voltage is not indicated, check horn relay and perform control switch test.

4. Release ``On'' button. Voltmeter should indicate 7.8 volts indicating ``On'' circuit is engaged. If
voltage does not remain, check amplifier ground, fuses or circuit breakers or replace amplifier with
known good amplifier and repeat test.

5. Replace as necessary.
``Off'' Circuit Test

1. Turn ignition ``On.''

2. Connect a voltmeter between light blue wire w/black hash and ground.

3. Depress ``Off'' button. Voltage should drop to zero indicating ``On'' circuit is de-energized.

4. If voltage does not drop to zero, perform ``Control Switch Test.''
``Set-Accelerate'' Circuit Test

1. Turn ignition ``On.''

2. Connect a voltmeter between light blue wire w/black hash and ground.

3. Depress ``On'' switch, then hold ``Set-Accel'' button on steering wheel. Voltmeter should indicate

4.5 volts. Rotate steering wheel back and forth and check for voltmeter fluctuations. If reading
varies more than .5 volts, perform ``Control Switch Test.''

``Coast'' Circuit Test

1. Turn ignition ``On.''

2. Connect a voltmeter between light blue wire w/black hash and ground.

3. Depress ``On'' switch, then depress and hold ``Coast'' button on steering wheel. Voltmeter
should indicate 1.5 volts. Rotate steering wheel back and forth and check for voltage fluctuations. If
reading varies more than .5 volts, perform ``Control Switch Test.''

``Resume'' Circuit Test

1. Turn ignition ``On.''

2. Connect a voltmeter between light blue wire w/black hash and ground.

3. Depress and hold ``Resume'' button. Voltmeter should indicate 6.5 volts.
If all circuits are functioning properly, perform ``Servo Assembly

Test'' using a known good amplifier. Do not replace amplifier before performing servo test.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Instrument Panel > Fuel Distance/Mileage Module
> Component Information > Locations

Right Hand Side of Instrument Panel

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Headlamp Control Module >
Component Information > Diagrams > Diagram Information and Instructions

Headlamp Control Module: Diagram Information and Instructions
Symbol Identification
Wire Color Code Identification

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Headlamp Control Module >
Component Information > Diagrams > Diagram Information and Instructions > Page 26

NOTE: Whenever a wire is labeled with two colors; the first color listed is the basic color of the
wire, and the second color is the tracer marking of the wire. If the second color is followed by by a
D, the tracer is dots. If the second color is followed by an H, the tracer is hash marks.

For example: BR/O is a brown wire with an orange stripe, R/Y D is a red wire with yellow dots and
BK/W H is a black wire with white hash marks.

BL: Blue BK: Black BR: Brown DB: Dark Blue DG: Dark Green GR: Green GY: Gray LB: Light Blue
LG: Light Green N:

Natural
O: Orange
PK: Pink R:
Red
P: Purple
T: Tan
V: Violet
W: White
Y: Yellow

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Headlamp Control Module >
Component Information > Diagrams > Diagram Information and Instructions > Page 27

Fig. 38 Headlamp Wiring Circuit

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component
Information > Locations

Horn Relay: Locations
Horn Relay Location
Under LH Side Of I/P.
Under LH Side Of I/P, With Speed Control

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component
Information > Locations > Page 31

Underneath LH Side Of I/P
Below LH Side Of I/P
Horn Relay With Speed Control
Bronco F-150 thru F-350, E-150 thru E-350 and Super F Series The horn relay is use on vehicles

equipped with speed control and is located under the left side of the instrument panel, left of the
steering column and is mounted on the outboard attaching screw of the speed control amplifier
module.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component
Information > Locations > Page 32

Horn Relay: Testing and Inspection
Fig. 3 Speed control wiring diagram. 1981---83 E-100-350 & 1984-87 E-150-350

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component
Information > Locations > Page 33

Fig. 4 Speed control wiring diagram. 1981 F-100-350 & Bronco

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Horn Relay > Component
Information > Locations > Page 34

Fig. 5 Speed control wiring diagram. 1982---83 F-100-350, 1984---87 F-150-350 & 1982---87
Bronco

1981-87 Models Exc. 1983-87 Ranger, 1984-87 Bronco II & 1986-87 Aerostar

1. Locate horn relay wire connector marked X and Y, Figs. 3, 4 and 5.

2. Using connector X, locate wire 460, then using a suitable voltmeter, check for battery voltage at
male side of connector.

3. Using connector Y, locate wire 1, then using a suitable voltmeter, check for battery voltage at
female side of connector. Depress horn, voltmeter should read zero and horn should sound. If
battery voltage remains, circuit is open. Connectors should remain connected during testing.

4. Check horn relay by momentarily grounding circuit 1 to chassis. This bypasses horn switch and
horn should sound. If horn does not sound, check for battery voltage at connector X wire 6 during
relay operation. If voltage is present at circuit 6 during relay operation, an open circuit is indicated
between horn and connector X.

5. If relay does not operate with battery voltage present at circuit 460 and circuit 1 is grounded,
replace relay.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Marker Lamp Relay >
Component Information > Locations

Marker Lamp Relay: Locations
LH Side Of Dash Panel

Attached To Dash Panel, Below Junction Block

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Trailer Lighting Relay >
Component Information > Locations

Trailer Lighting Relay: Locations
Attached To Dash Panel, Below Junction Block

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Lighting and Horns > Trailer Lighting Module >
Component Information > Locations

Trailer Lighting Module: Locations
Attached To Brake Pedal Assembly

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Electronic Throttle Control Module > Component Information > Locations

Electronic Throttle Control Module: Locations
Under LH Side Of I/P
Under LH Side Of I/P

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Electronic Throttle Control Module > Component Information > Locations > Page 49

Electronic Throttle Control Module: Testing and Inspection
Ford provides trouble code/symptom driven diagnostics for this component. For complete diagnosis

and pinpoint testing, refer to Computers and Control Systems, Testing and Inspection.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins >
Body/Frame - Arc Welding Precautions

Engine Control Module: Technical Service Bulletins Body/Frame - Arc Welding Precautions

Article No. 90-11-6
EEC IV-ELECTRONIC CONTROL MODULES AND PROCESSORS-POSSIBLE DAMAGE FROM

ARC WELDING
FORD: 1985-90 CROWN VICTORIA, ESCORT, MUSTANG, TEMPO, THUNDERBIRD 1986-90

TAURUS
LINCOLN-MERCURY: 1985-86 CAPRI
1985-90 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VII, TOPAZ, TOWN CAR 1986-90

SABLE
MERKUR: 1985-89 XR4Ti 1988-90 SCORPIO
LIGHT TRUCK: 1985-90 BRONCO II, BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER

1986-90 AEROSTAR 1989-90 F SUPER DUTY 1991 EXPLORER
ISSUE: Electronic control modules, including EEC processors, may be damaged if the negative

battery ground cable is not disconnected before arc welding is done to the vehicle, This occurs
because the arc welding process can produce high electrical currents in the body of a vehicle when
the negative battery ground cable is left connected.

ACTION: If arc welding procedures are to be performed, be sure to disconnect the battery ground
cable,

CAUTION: DISCONNECT THE NEGATIVE BATTERY GROUND CABLE BEFORE USING ANY
ELECTRIC WELDING EQUIPMENT

OTHER APPLICABLE ARTICLES: None WARRANTY STATUS: INFORMATION ONLY OASIS
CODES:

2800, 680000

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > Page
54

Right Hand Instrument Panel

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Engine Control Module > Component Information > Diagrams > Diagram Information
and Instructions

Engine Control Module: Diagram Information and Instructions

Symbol Identification
Wire Color Code Identification

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Engine Control Module > Component Information > Diagrams > Diagram Information
and Instructions > Page 57

NOTE: Whenever a wire is labeled with two colors; the first color listed is the basic color of the
wire, and the second color is the tracer marking of the wire. If the second color is followed by by a

D, the tracer is dots. If the second color is followed by an H, the tracer is hash marks.
For example: BR/O is a brown wire with an orange stripe, R/Y D is a red wire with yellow dots and

BK/W H is a black wire with white hash marks.
BL: Blue BK: Black BR: Brown DB: Dark Blue DG: Dark Green GR: Green GY: Gray LB: Light Blue

LG: Light Green N:
Natural
O: Orange
PK: Pink R:
Red
P: Purple
T: Tan
V: Violet
W: White
Y: Yellow

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Engine Control Module > Component Information > Diagrams > Page 58

Engine Control Module: Description and Operation
The center of the EEC IV system is a microprocessor called the Electronic Control Assembly

(ECA). The ECA, receives data from a number of sensors and other electronic components
(switches, relays, etc.). The ECA contains a specific calibration for optimizing emissions, fuel
economy, and driveability. Based on information received and programmed into its memory, the
ECA generates output signals to control various relays, solenoids, and other actuators.

The ECA in the EEC IV system is a microprocessor like the one in the other EEC systems. One
significant difference is that this ECA has the calibration module located inside the ECA assembly,
unlike the EEC III system.

The ECA is found in different locations, depending on the model.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Engine Control Module > Component Information > Diagrams > Page 59

Engine Control Module: Testing and Inspection
Ford provides trouble code/symptom driven diagnostics for this component. For complete diagnosis

and pinpoint testing, refer to Computers and Control Systems, Testing and Inspection.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations >
Component Locations

Main Relay (Computer/Fuel System): Component Locations
Fuel Pump Relay
Engine Compartment Components.
LH Side Of Engine Compartment, On Relay Bracket. Fuel pump relay is next to the EEC Relay.
Applicable to: 4.9L/6-300

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations >
Component Locations > Page 64

Engine Compartment Components.

LH Side Of Engine Compartment, On Relay Bracket. Fuel pump relay is next to the EEC Relay.
Applicable to: 5.0L/V8-302 & 5.8L/V8-350
Engine Compartment Components.
LH Side Of Engine Compartment, On Relay Bracket. Fuel pump relay is next to the EEC Relay.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations >
Component Locations > Page 65

Applicable to: 7.5L/V8-460
EEC Power Relay
Under Dash Panel
Next To, Or On ECA

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations >
Component Locations > Page 66

Right Hand Instrument Panel

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 67

Main Relay (Computer/Fuel System): Description and Operation
There are two types of relays: the power relay and the time delay power relay. The time delay relay

has a delay of 5 to 10 seconds and is used with an actuator assembly throttle control. Both relay
types consist of a movable contact in the normally open position. All power relays (except time
delay) have the same design with a different bracket attachment.

Function
EEC power relays are in parallel with the ignition switch and provide power to the EEC module.

Power relays also provide reverse battery protection and increased load handling to improve
ignition switch reliability.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Computers and Control Systems > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 68

Main Relay (Computer/Fuel System): Testing and Inspection
Ford provides trouble code/symptom driven diagnostics for this component. For complete diagnosis

and pinpoint testing, refer to Computers and Control Systems, Testing and Inspection.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Emission Control Systems > EGR Control Module > Component Information > Locations

EGR Control Module: Locations
Back View Of I/P
On I/P, To Left Of Steering Column

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Fuel Pump Relay > Component Information > Technical Service Bulletins > Customer
Interest for Fuel Pump Relay: > 90183 > Aug > 90 > Fuel Pump - Buzzing/Humming After Engine Shut Down

Fuel Pump Relay: Customer Interest Fuel Pump - Buzzing/Humming After Engine Shut Down

^ NO START - 1.9L, 2.3L, 3.0L, 3.8L, 4.9L, 5.0L, 5.8L, 7.5L - LOW STATE OF BATTERY
CHARGE

^ BATTERY - DISCHARGED - 1.9L, 2.3L, 3.0L, 3.8L, 4.9L, 5.0L, 5.8L, 7.5L
^ FUEL PUMP - NOISY - 1.9L, 2.3L, 3.0L, 3.8L, 4.9L, 5.0L, 5.8L, 7.5L
^ NOISE - "BUZZING" OR "HUMMING" FROM FUEL PUMP AFTER ENGINE IS TURNED OFF
Article No. 90-18-3 FORD:
1983-90 CROWN VICTORIA, ESCORT, EXP, MUSTANG, TEMPO, THUNDERBIRD 1986 LTD

1986-90 TAURUS
LINCOLN-MERCURY: 1983-87 LYNX
1983-90 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VII, TOPAZ, TOWN CAR 1985-86

CAPRI, MARQUIS 1986-90 SABLE
LIGHT TRUCK: 1983-90 BRONCO II, BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER

1988-90 F SUPER DUTY
ISSUE: A "buzzing" or "humming" noise from the fuel pump may occur after the engine has been

shut off. There may also be a no start condition or a discharged battery. These conditions are
caused by a sticking fuel pump relay.

ACTION: Install a new fuel pump relay. Refer to the following procedure for service details.

1. Check the fuel pump relay circuit for proper operation. Refer to the appropriate EVTM for
troubleshooting details.

2. Install a new fuel pump relay, if the old one is defective.

3. Check the vehicle for proper operation.
PART NUMBER PART NAME
F19Z-9345-A Fuel Pump Relay Assy.
OTHER APPLICABLE ARTICLES: None WARRANTY STATUS:
Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
901803A 1985-86 LTD/Marquis 0.6 Hr.
(includes pinpoint test)
901803A 1990 Town Car (includes 0.4 Hr.
pinpoint test)
901803A All Other Cars (includes 0.5 Hr.
pinpoint test)
901803A All Trucks (includes pinpoint 0.5 Hr.
test)

DEALER CODING
BASIC PART NO. CONDITION CODE
9345 09
OASIS CODES: 404000, 603300, 203000, 203100, 702000

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Fuel Pump Relay > Component Information > Technical Service Bulletins > All Technical
Service Bulletins for Fuel Pump Relay: > 90183 > Aug > 90 > Fuel Pump - Buzzing/Humming After Engine Shut Down

Fuel Pump Relay: All Technical Service Bulletins Fuel Pump - Buzzing/Humming After Engine Shut
Down

^ NO START - 1.9L, 2.3L, 3.0L, 3.8L, 4.9L, 5.0L, 5.8L, 7.5L - LOW STATE OF BATTERY
CHARGE

^ BATTERY - DISCHARGED - 1.9L, 2.3L, 3.0L, 3.8L, 4.9L, 5.0L, 5.8L, 7.5L
^ FUEL PUMP - NOISY - 1.9L, 2.3L, 3.0L, 3.8L, 4.9L, 5.0L, 5.8L, 7.5L
^ NOISE - "BUZZING" OR "HUMMING" FROM FUEL PUMP AFTER ENGINE IS TURNED OFF
Article No. 90-18-3 FORD:
1983-90 CROWN VICTORIA, ESCORT, EXP, MUSTANG, TEMPO, THUNDERBIRD 1986 LTD

1986-90 TAURUS
LINCOLN-MERCURY: 1983-87 LYNX
1983-90 CONTINENTAL, COUGAR, GRAND MARQUIS, MARK VII, TOPAZ, TOWN CAR 1985-86

CAPRI, MARQUIS 1986-90 SABLE
LIGHT TRUCK: 1983-90 BRONCO II, BRONCO, ECONOLINE, F-150, F-250, F-350, RANGER

1988-90 F SUPER DUTY
ISSUE: A "buzzing" or "humming" noise from the fuel pump may occur after the engine has been

shut off. There may also be a no start condition or a discharged battery. These conditions are
caused by a sticking fuel pump relay.

ACTION: Install a new fuel pump relay. Refer to the following procedure for service details.

1. Check the fuel pump relay circuit for proper operation. Refer to the appropriate EVTM for
troubleshooting details.

2. Install a new fuel pump relay, if the old one is defective.

3. Check the vehicle for proper operation.
PART NUMBER PART NAME
F19Z-9345-A Fuel Pump Relay Assy.
OTHER APPLICABLE ARTICLES: None WARRANTY STATUS:
Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
901803A 1985-86 LTD/Marquis 0.6 Hr.
(includes pinpoint test)
901803A 1990 Town Car (includes 0.4 Hr.
pinpoint test)
901803A All Other Cars (includes 0.5 Hr.
pinpoint test)
901803A All Trucks (includes pinpoint 0.5 Hr.
test)

DEALER CODING
BASIC PART NO. CONDITION CODE
9345 09
OASIS CODES: 404000, 603300, 203000, 203100, 702000

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Fuel Pump Relay > Component Information > Technical Service Bulletins > Page 87

Fuel Pump Relay: Locations
The EEC Power Relay is mounted to the Electronic Control Assembly in the rear center of the

instrument panel.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Fuel Pump Relay > Component Information > Diagrams > Diagram Information and
Instructions

Fuel Pump Relay: Diagram Information and Instructions

Symbol Identification
Wire Color Code Identification

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Fuel Pump Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 90

NOTE: Whenever a wire is labeled with two colors; the first color listed is the basic color of the
wire, and the second color is the tracer marking of the wire. If the second color is followed by by a

D, the tracer is dots. If the second color is followed by an H, the tracer is hash marks.
For example: BR/O is a brown wire with an orange stripe, R/Y D is a red wire with yellow dots and

BK/W H is a black wire with white hash marks.
BL: Blue BK: Black BR: Brown DB: Dark Blue DG: Dark Green GR: Green GY: Gray LB: Light Blue

LG: Light Green N:
Natural
O: Orange
PK: Pink R:
Red
P: Purple
T: Tan
V: Violet
W: White
Y: Yellow

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Fuel Shut-off Solenoid Relay > Component Information > Locations

Fuel Shut-off Solenoid Relay: Locations
LH Side Of Dash Panel
In Engine Compartment, On LH Side Of Dash Panel

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Component
Locations

Main Relay (Computer/Fuel System): Component Locations
Fuel Pump Relay
Engine Compartment Components.
LH Side Of Engine Compartment, On Relay Bracket. Fuel pump relay is next to the EEC Relay.
Applicable to: 4.9L/6-300

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Component
Locations > Page 98

Engine Compartment Components.

LH Side Of Engine Compartment, On Relay Bracket. Fuel pump relay is next to the EEC Relay.
Applicable to: 5.0L/V8-302 & 5.8L/V8-350
Engine Compartment Components.
LH Side Of Engine Compartment, On Relay Bracket. Fuel pump relay is next to the EEC Relay.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Component
Locations > Page 99

Applicable to: 7.5L/V8-460
EEC Power Relay
Under Dash Panel
Next To, Or On ECA

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Component
Locations > Page 100

Right Hand Instrument Panel

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 101

Main Relay (Computer/Fuel System): Description and Operation
There are two types of relays: the power relay and the time delay power relay. The time delay relay

has a delay of 5 to 10 seconds and is used with an actuator assembly throttle control. Both relay
types consist of a movable contact in the normally open position. All power relays (except time
delay) have the same design with a different bracket attachment.

Function
EEC power relays are in parallel with the ignition switch and provide power to the EEC module.

Power relays also provide reverse battery protection and increased load handling to improve
ignition switch reliability.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Fuel Delivery and Air Induction > Main Relay (Computer/Fuel System) > Component Information > Locations > Page 102

Main Relay (Computer/Fuel System): Testing and Inspection
Ford provides trouble code/symptom driven diagnostics for this component. For complete diagnosis

and pinpoint testing, refer to Computers and Control Systems, Testing and Inspection.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Ignition System > Ignition Control Module > Component Information > Technical Service Bulletins > Customer Interest: >
87720 > Apr > 87 > Tape Player - Ignition Noise Through Speakers

Ignition Control Module: Customer Interest Tape Player - Ignition Noise Through Speakers

RADIO - IGNITION NOISE THROUGH FACTORY Article No.
TAPE PLAYER - 4.9L - WITH TSB MODIFICATION87-3-20 87-7-20
LIGHT TRUCK: 1984-86 F SERIES, BRONCO
ISSUE: Ignition noise through the radio speakers when operating the radio in the tape player mode

may result if a new multispark ignition module was installed to correct a rough idle condition per
TSB 87-3-20.

ACTION: To correct this, modify the multi-spark ignition module wire harness as outlined in the
following service procedure.

1. Shorten the heavy gauge BLACK wire on the module to 14 inches (357 mm). Crimp on a new
solderless lug and hook up wire directly to negative terminal of battery.

2. Perform TSB 86-24-26 to eliminate the radio noise.
OTHER APPLICABLE ARTICLES: 86-24-26, 87-3-20 WARRANTY STATUS: Reimbursable within

the provisions of the Warranty and Policy Manual OPERATION: SP870720A TIME:

0.3 Hr.
DLR. CODING: Basic Part No. 12A199 Code: 85

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Ignition System > Ignition Control Module > Component Information > Technical Service Bulletins > Customer Interest: >
87610 > Mar > 87 > Engine - Stalling and/or A No Start Condition

Ignition Control Module: Customer Interest Engine - Stalling and/or A No Start Condition

^ STALL - THICK FILM IGNITION (TFI) MODULE - Article No.
EEC IV VEHICLES 87-6-10
^ STALL/NO START - THICK FILM IGNITION (TFI) MODULE - EEC IV VEHICLES
FORD 1984-87 ALL
LINCOLN-MERCURY 1984-87 ALL
MERKUR 1985-87 XR4Ti
LIGHT TRUCK 1984-87 ALL
ISSUE: Stalling and/or a no-start condition on vehicles with EEC IV and certain TFI modules may

be caused by moisture or salt splash entering at the upper right hand mounting hole of the TFI
module housing. This condition will result in a service code 14.

ACTION: To correct this, use the following diagnostic and service procedure to seal the hole and
prevent further concerns.

NOTE: The distributor does not have to be removed to perform this repair.

1. Check to see if the TFI-IV module part number suffix is A2A and the date code is 6K08 or prior,
(mounting hole was sealed after 6K08). If the suffix is not A2A, use normal diagnostic procedures
and do not perform Steps 2 and 3.

2. Thoroughly clean and dry upper right hand mounting hole of the TFI module with a clean paper
towel.

3. Fill the cleaned hole with silicone grease (D7AZ-19A331-A).

4. Clear service code 14 from memory.
PART NUMBER PART NAME CLASS
D7AZ-19A331-A Silicone Grease AM
OTHER APPLICABLE ARTICLES: None WARRANTY STATUS: Reimbursable within the

provisions of the Warranty and Policy Manual OPERATION: SP870610A TIME:

1.0 Hr. DLR. CODING: Basic Part No. 12A297 - Code:
09

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Ignition System > Ignition Control Module > Component Information > Technical Service Bulletins > Customer Interest: >
86220 > Jan > 86 > Ignition System - Weak/No Spark

Ignition Control Module: Customer Interest Ignition System - Weak/No Spark
Article No. 86-2-20
IGNITION SYSTEM - TFI - WEAK OR NO SPARK - DIAGNOSTIC TIP
FORD 1982-86 ESCORT, EXP; 1983-86 THUNDERBIRD, LTD, CROWN VICTORIA, MUSTANG;

1984-86 TEMPO; 1986 TAURUS
LINCOLN-MERCURY 1982-83 LN7; 1982-86 LYNX; 1983-86 COUGAR, MERCURY, GRAND

MARQUIS, CONTINENTAL, MARK VII, LINCOLN; 1984-86 TOPAZ; 1986 SABLE
LIGHT TRUCK 1983-86 EAND F-SERIES, RANGER, BRONCO; 1984-86 BRONCO II; 1986

AEROSTAR
CALIBRATIONS: All with TFI Systems
If the TFI module fails and causes a short to ground, the primary winding of the ignition coil can be

damaged. The TFI diagnostic procedure published in the Shop Manual will not identify this
condition.

When servicing a weak or no spark condition, perform the following:

1. Check for spark using the procedures found in the Manual Information, Computerized Engine,
Quick Test Section, Test 1.

2. If there is no spark, test the coil primary resistance using Rotunda digital volt-ohmmeter
007-00001, as shown.

3. If the coil primary resistance is O.K., continue with the diagnostic procedure in Test 1.

4. If the coil primary resistance is not O.K., replace the coil and recheck for weak or no spark. If the
spark is now O.K., the problem is resolved.

5. If the spark is still NOT O.K., continue with normal diagnostic procedure in Test 1.
OTHER APPLICABLE ARTICLES: None WARRANTY STATUS: "INFORMATION ONLY"
Wiring Harness

TFI-IV
Part 2
Test 5
TEST EQUIPMENT: VOM, STRAIGHT PIN
TEST PROCEDURE

1. Separate wiring harness connector from ignition module. Inspect for dirt, corrosion, and damage.
NOTE: PUSH connector tabs to separate.

2. Disconnect wire at S terminal of starter relay.

3. Attach negative (-) VOM, Rotunda Number 007-00001, lead to distributor base.

4. Measure battery voltage.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Ignition System > Ignition Control Module > Component Information > Technical Service Bulletins > Customer Interest: >
86220 > Jan > 86 > Ignition System - Weak/No Spark > Page 120

5. Following table below, measure connector terminal voltage by attaching VOM to small straight
pin inserted into connector terminal and turning ignition switch to position shown.

CAUTION: Do not allow straight pin to contact electrical ground.
CONNECTOR IGNITION SWITCH
TERMINAL WIRE/CIRCUIT TEST POSITION
#2 TO IGNITION RUN
COIL (-) TERMINAL
#3 RUN CIRCUIT RUN AND START
#4 START CIRCUIT START

6. Turn ignition switch to Off position.

7. Remove straight pin.

8. Reconnect wire to S terminal of starter relay.
TEST RESULT TEST RESOLUTION
90 percent of ^ Test result OK.
battery ^ Go to Part 2, Test 6.

voltage minimum
Less than 90 ^ Inspect for faults in wiring
percent of harness and connectors.
battery ^ Refer to vehicle wiring
voltage diagram for appropriate
circuit.
^ Damaged or worn ignition switch, Refer to Shop Manual, Group 33.
Primary Circuit Continuity
TFI-IV
Part 2
Test 8
TEST EQUIPMENT: VOM, STRAIGHT PIN
TEST PROCEDURE

1. Separate wiring harness connector from ignition module. Inspect for dirt, corrosion, and damage.
NOTE: PUSH connector tabs to separate.

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Ignition System > Ignition Control Module > Component Information > Technical Service Bulletins > Customer Interest: >
86220 > Jan > 86 > Ignition System - Weak/No Spark > Page 121

2. Attach negative (-) VOM, Rotunda Number 007-00001, lead to distributor base.

3. Measure battery voltage.

4. Attach VOM to small straight pin inserted into connector terminal No. 2.
CAUTION: Do not allow straight pin to contact electrical ground.

5. Turn ignition switch to Run position and measure terminal No. 2 voltage.

6. Turn ignition switch to Off position.

7. Remove straight pin.
TEST RESULT TEST RESOLUTION
90 percent of ^ Go to Part 2, Test 5.
battery voltage minimum
Less than 90 ^ Go to Part 2, Test 9.
percent of battery voltage
Ignition Coil Primary Resistance
TFI-IV
Part 2
Test 3
TEST EQUIPMENT: VOM
TEST PROCEDURE

1. Turn ignition switch to Off.

2. Disconnect ignition coil connector. Inspect for dirt, corrosion, and damage.

3. Measure resistance from positive (+) to negative (-) terminal of ignition coil, using Rotunda digital
volt-ohmmeter 007-00001.

TEST RESULT TEST RESOLUTION

0.3 to 1.0 ^ Test result OK.
ohm ^ Go to Test 4.
Less than ^ Replace ignition coil.

0.3 ohm or greater than 1.0 ohm

Ford F 150 2wd Pickup Workshop Manual (V8-351 5.8L (1986))
Ford Workshop Manuals > Relays and Modules > Relays and Modules - Powertrain Management > Relays and Modules ­Ignition System > Ignition Control Module > Component Information > Technical Service Bulletins > All Technical Service
Bulletins for Ignition Control Module: > 872110 > Oct > 87 > TFI Module/PIP Sensor - New Diagnostic Procedure

Technical Service Bulletin # 872110 Date: 871021