INSTALLATION INSTRUCTIONS
ELECTRICAL GAUGES/KITS
PREPARATION FOR INSTALLATION
1
© 2004 IEC - All Rights Reserved
MRP #93-0011 Rev. B
FUEL LEVEL
OIL PRESSURE
TEMPERATURE
This section
must
be read and followed before installation of the gauge is per-
formed.
1. Read instructions completely before installation.
2. Install gauges only when engine is cool and ignition is off.
3. Make sure all necessary tools, materials, and parts are on hand.
4. Always read the vehicle's service manual and follow it’s safety precautions
before any test or service procedure is performed.
5. Disconnect negative (-) battery cable before installing gauges (do not forget to
reconnect battery after installation is complete).
6. Locate the vehicle's oil pressure and/or coolant temperature sending units, and
verify the vehicle's sending unit port thread size is compatible with the thread
size on the gauge's sending unit and/or the supplied adapters. DO NOT DRILL
ANY HOLES IN DASH BEFORE ENSURING COMPATIBILITY. See the following notes.
NOTES:
■ If the vehicle's original temperature sending unit is used by the vehicle’s
computer for engine control functions, DO NOT REPLA CE.Consult the dealer (or a professional) to determine if the new sending unit can be installed in
an alternate location on the engine. If no suitable location is found, this
gauge is not suitable for your application.(See below for oil pressure gauge.)
■ For oil pressure gauges, a T-fitting (sold separately) may be used to accom-
modate the new gauge sending unit, and to keep the vehicle's original
sender operational.
7. Determine a mounting location for the gauge. Choose a location that does not
impair visibility or interfere with driving. Check behind the mounting location for
any wiring or components before drilling. Also take into consideration the routing
and length of the lead wires from gauge to engine sender port.
WARNING: Follow vehicle manufacturer’s service recommendations. Check
and maintain the vehicle’s engine regularly (cooling system level and condition, oil system level and condition, charging system condition, etc.). Never
rely on the gauges as the ONLY means of protection.
NOTE: For information on optional mounting configurations and mounting hardware,
visit us on the web at www.iequus.com
A. PANEL INSTALLATION
For On-Dash or Under-Dash mounting (panels are
optional with some gauge models and must be purchased separately).
1. Determine mounting location (see section 1, step 7).
2. Using gauge panel as a template, mark locations
for screws.
3. Drill small holes for the screws.
4. Mount panel in place and secure with screws and
flat washers provided.
MOUNTING AND INSTALLATION
2
B. IN-DASH MOUNTING
1. Using a hole template, cut out a 1-1/2", 2" or 2-5/8" (3,81 cm, 5,08 cm, or 6,67
cm) hole, as necessary, through the dashboard.
2. Using a round file, smooth out the rough edges around the drilled hole.
C. INSTALLING GAUGE INTO GAUGE
PANEL OR IN-DASH
1. Insert gauge through front of panel or hole in
dashboard, as applicable.
2. Hold gauge case and rotate gauge, as needed,
until gauge dial face is properly positioned in
front of dashboard/panel.Secure gauge in place.
3. Tighten locking ring on gauge in clockwise direction until gauge is tight against dashboard/panel.
Tighten locking ring HAND TIGHT ONLY.
Figure 1. Gauge Panel
Figure 2. Gauge Equipped
with Locking Ring
NOTE: Depending on the model of gauge, backlighting color may be changed to
either red, green or blue by installing the optional color filter over the bulb (not available for all gauge kits).
1. Insert the light bulb and socket assemblies into the light receptacles on the back
of the gauge and press firmly to snap/lock into place.
NOTE: Wire for gauge lights must be purchased separately. Use size 18-20
AWG stranded copper wire.
2. Splice the RED or WHITE wire from the gauge light(s) into the vehicle's lighting
circuit, between the dimmer control switch and the dash lights (consult the vehicle's service manual for proper wire).
GAUGE LIGHT INSTALLATION AND CONNECTION
3
3. Connect light socket BLACK wire to a good
chassis ground.
4. Insulate all connections with shrink tubing to
prevent shorting.
WARNING: For bulb replacement use only
part # 161 Instrument/Indicator wedge type
bulbs available at most auto parts stores.
DO NOT USE ANY OTHER PART NUMBER
SINCE THE HEAT PRODUCED BY A HIGHER
WATTAGE BULB WILL MELT THE GAUGE
CASE AND CREATE A FIRE HAZARD.
Figure 3. Light Bulb
Installation
A. ELECTRICAL OIL PRESSURE
1. Determine routing for gauge lead wires.Use an existing firewall grommet, or drill
a 3/8" (9,53 mm) hole through firewall to accommodate lead wires.Install a r ubber grommet (purchased separately) in hole, and use shrink tubing to protect
lead wires from chaffing or other damage.
2. Remove existing oil pressure sender. Install oil pressure sender provided with
gauge and tighten securely using proper wrench.
NOTE: Two types of oil pressure senders are used on oil pressure gauge kits.
Both senders work basically the same but the letter markings to identify the
"Sender" terminal and the "Warning Light" terminal on the senders are different.
Make connections as applicable.
NOTE: Oil pressure sender must ground to vehicle chassis. Do not use sealing
compound or Teflon tape on sender threads.
3. Crimp or solder ¼" (6,35 mm) female spade connectors (included) on gauge
positive (+), negative (-), and sender (S) wires.
NOTE:Wire must be purchased separately.Use 18-20 AWG stranded copper wire.
4. Crimp or solder bullet/spade connector (provided) on remaining end of sender wire.
5. Connect lead wires to gauge positive (+), negative (-), and sender (S) spade
posts. Route sender wire through grommet in firewall.
6. Connect negative (-) lead wire to a good bare metal electrical chassis ground.
7. Connect positive (+) lead wire into an existing switched (hot only when the igni-
tion switch is in the “ON” position) positive (+) accessory line in vehicle fuse
block.Insulate splices with electrical tape to prevent shorting.
8. Connect sender (S) lead wire to sender “S” or “G” terminal (as applicable) on oil
pressure sender.
9. If desired (or mandatory), existing oil pressure warning light can be used in conjunction with the Electrical Oil Pressure Gauge. (Only compatible with some
original equipment sending units that have only one lead wire. See note following for details.)
■ Disconnect warning light lead wire from vehicle’s existing oil pressure send-
ing unit, and crimp or solder bullet/spade connector on warning light lead
wire. Connect the warning light lead wire to warning light “W.L./G.” or “WK”
terminal (as applicable) on the oil pressure sender.
GAUGE CONNECTION
4
Figure 4. Electrical Oil Pressure Gauge Connections
3.0
3.0
OIL PRESSURE
GAUGE
CHASSIS
GROUND
s
BLACK
RED
SENDER
WIRE
SWITCHED +12V
(FUSE BOX)
OIL
PRESSURE
SENDER
S or G
W.L./G.
or WK
OPTIONAL
ADAPTER
OPTIONAL
GROMMET
TO WARNING LIGHT
LOCKING RING
OPTIONAL COLOR
BULB AND
SOCKET ASSEMBLY
ENGINE
BLOCK
FILTER
© 2004 IEC - All Rights Reserved
A. ELECTRICAL OIL PRESSURE (Cont)
NOTE: If the oil pressure warning light stays on when the engine is started (step 11), or if your vehicle’s original oil pressure sending unit has two
or more lead wires, this method will not work, and a T-fitting adapter (purchased separately) MUST be used to keep your existing oil pressure
sender and warning light operational.
10. Secure lead wires along their route to prevent damage from sharp edges, mov-
ing parts or hot engine components.
11. Reconnect negative (-) batter y cable. Start and run engine for approximately 30
seconds.T urn off engine and check gauge installation f or leaks.Tighten joints as
needed and retest.
B. ELECTRICAL WA TER TEMPERATURE
1. Determine routing for gauge lead wires.Use an existing firewall grommet, or drill
a 3/8" (9.53 mm) hole through firewall to accommodate lead wires.Install a r ubber grommet (purchased separately) in hole, and use shrink tubing to protect
lead wires from chaffing or other damage.
2. With engine cold, drain coolant below the level of e xisting temperature sender (dispose of coolant properly).Remove existing w ater temperature sender. Install water
temperature sender provided with gauge and tighten securely.
NOTE: Temperature sender must ground to vehicle chassis.Do not use sealing
compound or Teflon tape on sender threads.
3. Crimp or solder ¼" (6.35 mm) female spade connectors (included) on one end
of gauge positive (+), negative (-), and sender (S) wires.
NOTE: Wire must be purchased separately. Use 18-20 AWG stranded copper
wire.
4. Crimp or solder bullet connector (provided) on remaining end of sender wire.
5. Connect lead wires to gauge positive (+), negative (-), and sender (S) spade
posts. Route sender wire through grommet in firewall.
6. Connect negative (-) lead wire to a good electrical chassis ground.
7. Splice positive (+) lead wire into an existing switched (hot only when the ignition
switch is in the “ON”position) positive (+) accessory line in vehicle's fuse panel.
Insulate the splices with electrical tape to prevent shorting.
8. Connect sender lead wire to water temperature sender.
9. Secure lead wires along their route to prevent damage from sharp edges, mov-
ing parts or hot engine components.
10. Refill radiator. Reconnect negative (-) battery cable. Start and run engine and
check gauge installation for leaks.Tighten joints as needed and retest.
Figure 5. Electric Water Temperature Gauge Connections
C. FUEL LEVEL GAUGE
Fuel Level Gauges do not include a fuel level sending unit.These gauges are
made to be used in combination with the vehicles existing fuel level sending
unit (not applicable for all vehicle models). Ensure that the gauge matches
vehicle’s fuel le vel sending unit specifications as described in the “Fuel Gauge
Application Table”below before installation.
■ Fuel Level Gauges utilize a variable resistance sending unit located inside the
fuel tank for operation. The variable resistor in the fuel level sending unit is
designed to change it’s resistance value (higher or lo wer) whene ver the fuel le v el
in the fuel tank changes.The range and value of the variable resistors that are
used on sending units vary depending on the vehicle manufacturer, vehicle
model and/or year.
■ Three types of fuel level gauges are available,and each gauge is calibrated to
be compatible
only
with the manufacturer’s sending units that have the spec-
ifications shown in the “Fuel Gauge Application Table” below.
FUEL GAUGE APPLICATION TABLE
*An optional sending unit that matches the General Motors fuel level gauge is available through your local distributor (NOT available for Ford, Chrysler or AMC
gauges).
1. Determine routing for gauge lead wires.Use an existing firewall grommet, or drill
a 3/8” (9.53 mm) hole through firewall to accommodate lead wires. Install a rub-
ber grommet (purchased separately) in hole, and use shrink tubing to protect
lead wires from chaffing or other damage.
NOTE: Fuel level gauge lead wires must be purchased separately. Use size 1820 AWG stranded copper wire.
2. Crimp or solder ¼" (6.35 mm) female spade connectors (included) on one end
of gauge positive (+), negative (-), and sender (S) wires.
3. Connect lead wires to gauge positive (+), negative (-), and sender (S) spade
posts.
4. Connect negative (-) lead wire to a good bare metal electrical chassis ground.
5. Splice positive lead wire into an existing switched (hot only when the ignition
switch is turned to the “ON” position) positive (+) accessory line in the vehicle’s
fuse panel. Insulate the splices with electrical tape or shrink tubing to prevent
shorting.
6. Route sender wire through grommet in firewall.
7. Connect sender(s) lead wire to output or ‘S’post on vehicle’s existing fuel level
sender.
8. Secure lead wires along their route to prevent damage from sharp edges, moving
parts or hot engine components.Reconnect negative (-) battery cable.Turn ignition
on and verify that fuel level gauge indicates proper fuel level.
■ To determine a vehicle’s fuel level sending unit specifications, discon-
nect the vehicle’s sending unit wire from the vehicle’s Fuel Gauge.
Measure the resistance between the sending unit and chassis ground
when the fuel tank is empty, and again when the fuel tank is full. Match
the results obtained to the specifications listed below
Sender Range Specifications (±10 Ohms)
Gauge Type When empty,must read When full, must read
General Motors* 0 Ohms 90 Ohms
Ford and Chrysler 73 Ohms 10 Ohms
AMC and S/W 240 Ohms 33 Ohms
Figure 6. Fuel Level Gauge Connections
The Manufacturer warrants to the original purchaser that this unit is free of defects in materials and work-
manship under normal use and maintenance for a period of one (1) year from the date of original purchase.
If the unit fails within the one (1) year period, it will be repaired or replaced, at the Manufacturer's option, at
no charge, when returned prepaid to the Technical Service Center with Proof of Purchase.The sales receipt
may be used for this purpose.Installation labor is not covered under this warranty.
All replacement parts, whether new or re-manufactured, assume as their warranty period for only the
remaining time of this warranty. This warranty does not apply to damage caused by improper use, accident, abuse, improper voltage, service, fire, flood, lightning, or other acts of God, or if the product was
altered or repaired by anyone other than the Manufacturer's T echnical Service Center .Consequential and
incidental damages are not recoverable under this warranty. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion ma y not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which vary from state
to state. No portion of this warranty may be copied or duplicated without the expressed written permission from the Manufacturer.
Obtaining Warranty Service:
Products requiring service should be returned as follows:
1. Call the Technical Service Center to obtain a Return Reference Number:
USA & Canada = 1-800-544-4124
Other = 714-241-6805
2. Package the product carefully to prevent shipping damage
3. Include your name, return address, and a day contact phone
4. Enclose a copy of the dated sales receipt
5. Describe the problem
6. Ship prepaid to:Technical Service Center, 17291 Mt.Herrmann Street, Fountain Valley, CA 92708 U.S.A.
Phone: 1-800-544-4124 or 714-241-6805 Fax: 714-432-7910
Web: www
.iEQUUS
.com Email: ser vice@iEQUUS.com
LIMITED WARRANTY AND SERVICE PROCEDURES
TEMPERATURE
GAUGE
CHASSIS
GROUND
s
BLACK
SENDER
WIRE
RED
SWITCHED +12V
(FUSE BOX)
OPTIONAL
GROMMET
OPTIONAL
ADAPTER
ELECTRICAL
TEMPERATURE
SENDER
ENGINE
BLOCK
FUEL LEVEL
GAUGE
CHASSIS
GROUND
s
BLACK
RED
SENDER
WIRE
SWITCHED +12V
(FUSE BOX)
OPTIONAL
GROMMET
FUEL LEVEL
SENDER