Peterbilt 387 EWD wiring diagrams
Model 387 Schematics (01 of 59) SK30218 A 01
SLEEPER LOAD
CENTER
MEGA FUSES
SCALE 1:2 0
TRAILER LOAD
CENTER
SH
NO.
1) INDEX SYMBOL KEY
2) HARNESS FLOW CHART
3) +12V POWER D ISTRIBUTION
4) NEGATIVE POWER DISTRIBUTION
5) +12V POWER DISTRIBUTION (OPTIONAL DISCONNECT)
6) WIPER/ WASHER
7) HORN
8) MANUAL FAN CONTROL
9) HVAC CUMM INS/CATERPILLAR
10) TURN S IGN A L/STOP /HAZA R DS /AUX TR A ILER
11) REVERSE LAMPS
12) MARKER LAMPS
13) HEAD LAMP/DRL
14) FOG LAMPS
15) FUEL HEATER
16) AIR DRYER
17) INTERFACE MODULE
18) SPOT LAMPS
19) LOAD LAMPS
BRACK ET M O UNT ED/FLUSH M OU NTED /
M UTIPLE /COIL 10 ’
20) FLUORESCENT LAMP SLEEPER
21) FLOOR LAMP
22) ETHER START CATER PILLAR
23) WINDOW LIFT
24) CENTRAL DOOR LOCKS
25) DOOR LAMPS/DOME LAMPS
26) PREMIUM SOUND
27) SLEEPER TOOL BOX LAMPS
28) SLEEPER CLOCK
29) AUX FAN
30) SLEEPER READING LAMPS
31 ) REF RIGERATOR UNIT REFE R
32) SLEEPER POWER ACCE SS OUT LETS
33) SLEEPER FLOOR LAMP
34) SLEEPER HVAC
35) DIGITAL MESSAGE CENTER
36) ABS LOW
37) ABS HI
38) CAB CIGAR LIGHTER PWR COM M
39) SPARE SWITCHES
40) TWO SPEED/INTER/FIFTH WHEEL/DI FF LOCK/PTO
41) LOW COOLANT
42) EATON TOP 2 TRANSMISSION
43) MIRROR CONTROL/HEATER
44) ENGINE BRAKE/CRUISE CONTROL/DI AGNOSTIC
45) RADIO
46) SPARE POWER/SYSTEM SLEEP ER
47) CATERPILLAR CUMMINS ENGINE ECU/TPS/
SPEED SENSOR/INTERUPT/WARNING LAMPS
48) SMC SPEEDO MESS AGE CENT ER
49) DATA LINK
50) CAB SPARE POWER/SYSTEM EXPANSION
51) CB RADIO
52) BACKLIGHTING +12VOLTS
53) NEGATIVE SWITCH LINKS
54) SPLICE LOCATION - DISTRIBUTION
55) SPLICE LOCATION - DISTRIBUTION
56) ASH TRAY
57) CAB/CHASSIS HARNESS LAYO UT
58) SLEEPER HARNESS LAYOUT
59) FUEL HOT LINE
TITLE
SYMBOL/ ABBREVIATION KEY
1) STUD
S1
2) SPL ICE
3) RING TERMIN A L CONNECTORS 3) RING TERMIN A L CONNECTORS
4) NUMBERS EX CIRCU IT DES CRIPTION SUF FIX ALPHA
286 -1 A
FOR CIRCUIT NUMBER FUNCTION SEE SK06520
5) RED S OLID COLORS
RED/BLACK SOLID COLOR WITH STRIPE
S OLID/STRIPE
6) BUSS B AR
7) 1 CO NNE CTOR A PPEARS O N M ULT IPLE SHEETS
8) CLC CHASSIS LOAD CENTER
9) SLPR SLEEPER
10) TRLR TRA ILER
11 ) MU L T I CORE CABLE
12 ) CONTIN UED TO O T HER SH XX
13 ) MOMENTARY CONT ACT
CONTACT
14 ) BUL B
SWITCH
SHEET NUMBER
NA
NA
OPTIONAL EXPAN SION
SLEEPER
CHASSIS
LOAD CENT ER
SCALE 1:20
CAB OPTI ONAL
EXPANSION
(BEHIND GLOVEBOX)
CAB
LOAD CEN TER
(BEHIND GLOVEBOX )
PD8A3417.FRM
Model 387 Schematics (02 of 59) SK30218 A 0 2
BAT +
TRAILER
(HARNESS)
LOAD
CENTER
TRAILER
CABLES
HOOD
(HARNESS)
STOP L/P
(HARNESS)
CHASSIS
(HARNESS)
LOAD
CENTER
CHASSIS
(HARNESS)
SIDE REPEATER
(HARNESS)
ABS (HARNESS)
CAB
COWL
(HARNESS)
ABS (HARNESS)
CHASSIS
ENGINE
(HARNESS)
DASH
ENGINE
HARNESS
MEGA FUSE
ASSY
CAB (PC)
LOAD
CENTER
CAB
(HARNESS)
DATA
LINK
HOTLINE
POWER
W/L BAR
37WAY
DOOR
CONTROL
(HARNESS)
LH DOOR
(HARNESS)
HOTLINE
CHASSIS
(HARNESS)
INSTRUMENTS
(HARNESS)
HEADER
LOAD
LIGHT
(HARNESS)
HOTLINE
CAB
(HARNESS)
SLEEPER (PC)
LOAD
CENTER
SLEEPER
(HARNESS)
HARNESS FLOW CHART
RADIO
HARNESS
MIRROR
GLARE
STOPPER
MESSAG E
CENTER
RH DOOR
(HARNESS)
SMC
(SPEEDO
MESSAGE
CENTER
HARNESS)
PD8b3417.frm
Model 387 Schematics (03 of 59) SK30218 A 0 3
31-1 , RED
ENG9
R
E
D
RED
ENG8
-
+
S
STARTER
B+
ALTERNATOR
G
-
+
-
+
-
+
BATTERIES
D
E
R
,
1
7.5A
LOCATION BATTERY BOX
SH 2
BATTERY DISCONNECT OPTION
BDC-1
239-1 , BLACK
298-1 , ORANGE
BDC-2
B
B
A
A
BDC-4
BDC-3
B
B
A
A
298-4 , ORANGE
239-4 , BLACK
RED
239-1 , BLACK
298-1 , ORANGE
789
3
2B
1
5B
6
4
10
BATTERY
DISCONNECT
SWITCH
239-1 , BLACK
298-1 , ORANGE
239-2 , BLACK
S2
BATTERY
DISCONNECT
SOLENOID
BLACK, 239-3
298-2 , ORANGE
S1
RED (NOT WITH BATTERY DISCONNECT)
86
30
87
85
298-3 , ORANGE
CHASSIS
LOAD CENTER
CAB
LOAD CENTER
SLEEPER
LOAD CENTER
TRAILER
LOAD CENTER
RED
W/L
ORANGE
ORANGE
298-1D ORANGE
ORANGE
1
REAR
BATTERY
BOX ONLY
ORANGE
SLPR28
B-
D+
150A 150A 100 A 100A
ORANGE
CLC8
ORANGE
ORANGE
231
FIREWALL
CAB3
MEGA
FUSES
1, RED
ORANGE
ORANGE
SH 57
TRLR2
OPTIONAL
+12V POWER DISTRIBUTION (OPTIONAL DISCONNECT)
PD8b3417.frm
Model 387 Schematics (04 of 59) SK30218 A 0 4
B+
LH
CHASSIS
RAIL
+
+
+
BATTERIES
LH
CHASSIS
RAIL
TO
TRAILER
RADIATOR
239-2JJ , WHITE
1
BLACK
INTERFACE
NEGATIVE
POWER DISTRIBUTION
G
+
S
BLACK
-
BLACK
-
BLACK
-
239-15G , BLACK
, BLACK
239-1
SH 2
CLC11
TRLR3
BLACK
,
239-1KK
239-3JJ , WHITE SH 9
S1
TRAILER
LOAD CENTER
-
ENG6
STARTER
239-7Q, BLACK
239-17D , BLACK
SH 5
CLC6
CHASSIS12
BLACK
239-1NN
S4
239-2KK
BLACK
S2
239-13G
BLACK
S3
239-9L
BLACK
239-7S, BLACK
S5
239-15H
BLACK
S10
239-16E
BLACK
BLACK
239-14J
S9
239-11J
BLACK
239-10L
TAIL LAMP ASSY
BLACK
D
CHASSIS2
SPARE
CHASSIS5
AXLE
CHASSIS7
AXLE
F
CHASSIS11
A
CHASSIS10
SPARE
239-1F, BLACK
REP1
S1
S2
239-16, BLA CK
239-2MM, BLACK
239-3E, BLACK
SH 53
SH 53
SH 24
SLEEPER
LOAD CENTER
W/L
SH 10
SH 10
ENGINE
239-1MM, BLACK
239-57B, BLACK
239-2LL, BLACK
S2
239-16F
BLACK
SLPR29
CAB
FLOOR
D+
ALTERNATOR
B-
ENG8
, BLACK
239-6R
S1 S2
239-8Q, BLACK
S2
239-4BB, BLACK 239-1JJ , BLACK
BLACK
,
239-1LL
CLC9
FIREWALL STUD
1
1
B
X
1
-
,
B
L
X1-12B, BLACK
, BLACK
JUMPE R
PASSANGER FOOTWELL
SLEEPER FLOOR
ENG11
C
K
SH 36
A
SH 36
J
0
9
1
3
-
C
A
L
,
2
B
CYLINDER HEAD STUD
CLC4 HOOD8
K
JUMPER, BLACK
S1
PD8b3417.frm
Model 387 Schematics (05 of 59) SK30218 A 0 5
SPARE SPARE SPARE
S4
SH 50
CAB PANEL
CAB
LOAD
CENTER
SH 14
304-2B, RED
S2
S2
SPARE
3
15A
15A
SPARE SPARE
WIPER/WASHER
REVERSE LAMPS
239-12, BLA CK
239-13, BLACK
SLEEPER LOAD CENTER
S4
RED
,
FOR SPARE
304
SH 46
25A
RED
CHASSIS LOAD CENTER
20A
304-3D, RED
4
0
-
B
5
E
D
,
R
10A
20A
10A
SH 8, FAN )
SH 13, DRL
29-1A , PURPLE
ENG23
ENG24
A
A
239, BLACK
B
B
A239, BLACK
ENG25
A
B
SH 13SH 13
SPARE
15A
SH 9, A/C CLUTCH
SH 47, ENGINE IGNITION
SH 50
SPARE
SPARE
15A
239, BLACK
CAB LOAD CENTER
15A5A20A
FOG LAMPS
SH 16, AIR DRYER
SH 15, FUEL FILTER
SH 17, INTERFACE MOD ULE SH 17, INTERFACE MOD ULE
WITH OVER CRANK PROTECTION
WITHOUT OVER CRANK PROTECTION
298-1A, ORANGE
ENG22
A
B
-
SPARE
20A
20A
LH HEADLAMP SH 13
RH HEADLAMP SH 13
+
S
STARTER
CAB3
1
40A
SPARE SPARE
SPARE
BLOWER SH 34
HVAC HTR
FA N
SH 11
8-1A, BROWN
TRAILER LOAD CENTER
20A
20A
20A
SPARE
20A
SPARE
20A
SPARE
20A
SPARE
E
G
N
A
R
O
,
1
8
9
2
TRLR2
1
A8-1A, BROWN
242-1B, RED
39-1A, ORANGE/BLUE
3-1A, WHITE
39-2 , ORANGE/BLUE
20-1 , ORN/BLACK
SH 9
SH 9
SH 9
SH 9
SH 11
30A
SH 10
TURN SIGNAL
298-6C, ORANGE
298-3B, ORANGE
30A
30A
SH 12
SH 47
ENGINE STOP
MARKER LAMP S
STOP LAMP, SH 43
, PURPLE
A29-1A
298-2AB, ORANGE
30A
SH 47
SH 47
ENGINE BATTERY
A29-1, PURPLE
, PURPLE
A29-2
SH 22
286-2A, RED
86
30
87A
87
85
304-1C, RED
239-12J, BLACK
239-12, BLACK
12-1 , ORANGE
IGNITION
SWITCH
15A
SH 22
EITHER
IGNITION
SH 10
30A
50A
286-1B, RED
BLACK/ORANGE
SH 47
30-1A,
ENGINE BATTERY
ENGINE BATTERY
87A
START
RED286-2, RED
286-1,
29-1 , PURPLE
B522-1 , RED/BLACK
1
0
3
6
2
86
30
87
85
+12V POWER
AND ST AR T I N G
226-5D,
SH 34
PD8b3417.frm
Model 387 Schematics (06 of 59) SK30218 A 0 6
SH5
402-1 , RED/YELLOW
S1
239-4 , BLACK
404-1 , LtBLUE/YELLOW
239-1 , BLACK
397-1 , RED
398-1 , RED/BLUE
403-1 , RED/BLACK
239-2 , BLACK
1
P
1
FW2
FW3
W
M
FW5
7
3
5
2
4
A
E
R
W
I
P
O
M
S
H
E
R
O
O
T
M
O
T
R
R
397-1A, RED
397-3A, RED
S7
397-2A, RED
CAB10
7 65432
, RED/BLUE
398-1A
, RED
, RED/BLUE
397-1B
398-1B
W
O
E
L
L
U
L
E
B
Y
/
/
K
D
D
D
C
E
E
E
A
R
R
R
L
B
,
,
,
,
B
B
B
7
1
1
1
4
-
-
-
-
8
7
2
9
9
9
0
3
3
3
4
2
397-3 , RED
1234
WIPER/WASH
SWITCH
CLC12
239-16, BLACK
404-1A, LtBLUE/YELLOW
402-1A, RED/YELLOW
403-1A, RED/BLACK
RED/BLACK
RED/YELLOW
,
403-1B ,
402-1B
404-1B, LtBLUE/YELLOW
S1
403-1B, RED/BLACK
4312
CAB9
S2
WIPER/WASHER
PD8b3417.frm
Model 387 Schematics (07 of 59) SK30218 A 0 7
PINK/BLACK
243-1B ,
243-1B , PINK/BLACK
PINK/BLACK
A243-1 ,
CAB40
1
FIREWALL
CAB LOAD
CENTER
FIREWALL
STEERING COLUMN
OEM HARNESS
11
243-1A , PINK/BLAC K
CLC12
1
FW6
243-1 , PINK/BLACK
239-3CC, BLACK
B
A
HORN
S1
HORN
PD8b3417.frm
Model 387 Schematics (08 of 59) SK30218 A 0 8
CUMMINS
NOTE: FAN SHOWN IN "ON" CONDITION
A
239-5 , BLACK
B
220-1 , WHITE/LtGREEN
FW4
FAN
SOLENOID
CATERPILLAR
NOTE: FAN SHOWN IN "ON" CONDITION
FAN
SOLENOID
S1
A
239-5U , BLACK
B
220-1B , WHITE/LtGREEN
FW4-A
8
220-1A , WHITE/LtGREEN
CLC12
S1
1
2
BLACK/GREEN
,
B646-1A
1
2
SH 5
, RED
226-1
3
ENGINE
FAN
4
5
A522-1 , GREEN/WHITE
A220-1 , WHITE/LtGREEN
522-1A , WHITE/GREEN
522-1 , WHITE/GREEN
B646-1 , BLACK /GREEN
SH 5
RED
226-1M,
3
ENGINE
4
5
FAN
A522-1B, GREEN/WHITE
A220-1C, WHITE/LtGREEN
522-1C , WHITE/GREEN
A522-1A , GREEN/W HITE
A220-1A, WHITE/GREEN
522-1B , WHITE/GREEN
13
OEM HARNESS
12
A522-1C, GREEN/WHITE
A220-1D, WHITE/GREEN
522-1E , WHITE/GREEN
239-25 , BLACK
253-7 , LtBLUE
13
CUMMINS
12
ECU
2B
5B
789
7
2B
5B
3
MANUAL
1
FAN
SWITCH
6
4
10
SH 53
SH 52
9
3
MANUAL
1
FAN
SWITCH
6
4
10
8
MANUAL FAN CONTROL
220-1C, WHITE/LtGREEN
522-1D , WITE/GREEN
239-10C , BLACKB646-1B, BLACK/GREEN
S2
239-25C , BLACK
253-7B , LtBLUE
CATERPILLAR
ECU
SH 53
SH 52
PD8b3417.frm
Model 387 Schematics (09 of 59) SK30218 A 0 9
A
B
,
LtGREE N/W HITE
93-1B
HVAC
UNIT
C
180-1 , YELLOW/WHITE
D
180-1 , YELLOW/WHITE
E
570-3 , YELLOW/WHITE
F
CAB51
D
634-1 , WHITE
B
239-59 , BLACK
A
152-1 , RED/YELLOW
C
342-3 , YELLOW/WHITE
E
629-2 , BLUE
F
634-2 , WHITE
G
629-1 , BLUE
H
CAB50
A
45-1 , LtBLUE/BLACK
D
212-1 , RED/GREEN
C
240-1 , LtGREEN/WHITE
B
153-1 , RED/BLUE
CAB49
S13
S16
342-5 , YELLOW/WHITE
TEMP-1, GRAY/BLACK
239-59 , BLACK
342-1 , YELLOW/WHITE
239-62 , BLACK
239-60 , BLACK
239-58 , BLACK
A248-1 , RED/BLACK
253-24 , LtBLUE
570-4 , YELLOW/WHITE
CAB58
A
TEMP
SENSOR
B
HVAC
LOAD CE N T ER
CAB
SLEEPER
A/C PRESSURE
A/C PRESSURE
8
8
SLPR
SWITCH
SWITCH
COMPRESSOR
A
B
ENG14-A
B
A220-1B, WHITE/LtGREEN
A
A646-1 , LtGREE N
ENG14
B
93-1A, LtGREEN/W H ITE
A
ENG15
A/C
457-3 , BLACK
A220-1E, WHITE/LtGREEN
239-6S , BLACK
SH 34
17
18
OEM HARNESS
S2
B93-2, LtGREEN /W HITE
B93-1 , LtGREEN/WH ITE
1
3
A/C CLUTCH
4
5
A629-1, BLUE/BLACK
A634-1 , WHITE/BLACK
570-5 , YELLOW/WHITE
239-60 , BLACK
TEMP-1, GRAY/BLACK
342-4 , YELLOW/WHITE
634-2 , WHITE
629-1 , BLUE
93-1B, LtGREEN/WHITE
45-1
,
LtBLUE/BLACK
A629-1 , BLUE/BLACK
570-2 , YELLOW/WHITE
239-62 , BLACK
A248-1 , RED/BLACK
DCBA
CAB46
342-2 , YELLOW/WHITE
152-1 , RED/YELLOW
A634-1 , WHITE/BLACK
634-1 , WHITE
253-24 , LtBLUE
629-2 , BLUE
239-58 , BLACK
570-5 , YELLOW/WHITE
CAB48
HGFEDCBA
212-1 , RED/GREEN
DCBA
CAB47
239-57 , BLACK
240-1 , LtGREEN/WHITE
153-1 , RED/BLUE
SH 4
G
F
H
D
C
E
B
A
CAB52
HVAC
MODULE
A93 -1, LtGR EEN/WHITE
45-1A, LtBLUE/BLACK
2
CATERPILLAR
ECU
17
CUMMINS
ECU
18
SH 5 SH 5
93-1, LtGR EEN/W H IT E
HVAC CONTROLLER
HVAC CU MM INS/CATERPILLAR
PD8b3417.frm
Model 387 Schematics (10 of 59) SK30218 A 1 0
D
TURN
SIGNAL
C
SWITCH
B
A
CAB8
A
HAZARD
SWITCH
281-1 , WHITE
B
CAB6
85-3 86-3
FLASHER
UNIT
87-3
227-2 , GREEN/BLACK
228-2 , YELLOW/BLACK
E
U
L
B
/
E
G
N
A
R
O
,
1
9
3
A
37-1 , GREEN
38-1 , YELLOW
227-1 , GREEN/BLACK
228-1 , YELLOW/BLACK
281-1 , WHITE
39-1 , ORANGE/BLUE
CAB PANEL
CAB
24
LOAD
CENTER
14
LIGHT BAR
CAB PANEL
37-1A , GREEN
38-1A, YELLOW
227-2A, GREEN/BLACK
228-2A, YELLOW/BLACK
281-1A, WHITE
39-1B, ORANGE/BLUE
SH 5
10
WARNING
LAMP
1
BAR
SH 5
SH 47
SH 5
WHITE
ORANGE/BLUE
,
, W HITE
39-2
3-1
A281-2,
SH 5
SH 5
SH 5
, WHITE
3-1A
3-2 , WHITE
86
30
S6
S5
STOP LAMP
87A
87
85
A281-2 , WHITE
SH 5
TRAILER LOAD CEN T ER
242-1B, RED
ACC
286-1B, RED
39-1A, ORANGE/BLUE
86
85
TURN SIGNAL
86
85
STOP LAMP
86
85
239-3 , WHITE
30
87A
87
30
87A
87
30
87A
87
SH 4
WHITE
,
239-4A
BLUE
AUX ,
239-5A, WHITE239-6 , WHITE
A227-1, GREEN
279-1 , RED
A228-1, YELLOW
TO TRAILER
INTERFACE
RH
FRONT
TURN
SIGNAL
LH
FRONT
TURN
SIGNAL
GREEN
GREEN
WHITE
227-4 , GREEN/BLACK
228-4 , YELLOW/BLACK
281-2 ,
227-1E , GREEN/BLACK
281-1B, YELLOW/BLACK
228-1E, YELLOW/BLACK
, WHITE
227-1B , GREEN/BLACK
A281-1
228-1A, YELLOW/BLACK
227-1A, GREEN/BLACK
228-1B, YELLOW/BLACK
227-3 , GREEN/BLACK
B
A
A281-1A, WHITE
A
B
239-11A , BLACK
HOOD14
STP1
E
K
T
I
C
H
A
L
W
B
,
,
B
A
1
-
1
-
1
9
8
3
2
2
A
AB
STP2
STOP
LAMP
SWITCH
S1
TURN SIGNAL/STOP/HAZARD/AUX TRAILER
228-3 , YELLOW/BLACK
2
2
4
4
9
9
10
10
228-1D, YELLOW/BLACK
CHASS1
CLC3
37-1B, GREEN
38-1B, YELLOW
227-1D , GREEN/BLACK
TURN SIGNAL
RH
REAR TURN
SIGNAL
TLJ1-B
C
D
239-1KL , BLACK
B
A
228-1C, YELLOW/BLACK
REP1
86
30
87A
87
85
37A, BLACK
239-4X, BLACK
239-7 , WHITE
TLJ2-B
S4
S2
239-2C, BLACK227-1C, GREEN/BLACK
REAR TURN
SIGNAL
C
239-3A, BLACK
SH 12
LH
B
C
REP2
B
C
REP3
LH
SIDE
REPEATER
RH
SIDE
REPEATER
PD8b3417.frm
Model 387 Schematics (11 of 59) SK30218 A 1 1
SH 5
NOT USED
REVERSE
LAMP
SWITCH
B
239-7T , BLACK
A
A269-1A, PINK/WHITE
ENG16
242-2 , RED
A269-2 , PINK/WHITE
S2
1
3
REVERSE LAMP
4
5
2
269-1 , PINK/WHITE
E
T
I
H
W
/
K
N
I
P
,
1
9
6
2
A
242-1 , RED
CLC3
3
3
269-1A , PINK/WHITE
CHASS1
S5
269-2 , PINK/WHITE
A
CHASS8
SPARE
BACKUP
, PINK/WHITE
269-3
REVERSE LAMPS
269, BLACK
A
TLJ1-A
A
TLJ2-A
LH RH
REVERSE LAMPS
PD8b3417.frm
Model 387 Schematics (12 of 59) SK30218 A 1 2
SH 53
ICC
LAMPS
HDR2
2
5-1A , ORANGE/BLACK
1
239-1C, BLACK
HDR3
2
5-2 , ORANGE/BLACK
1
239-2A, BLACK
HDR4
2
5-3 , ORANGE/BLACK
1
239-3B, BLACK
HDR5
2
5-4 , ORANGE/BLACK
1
239-4B, BLACK
HDR6
2
5-5 , ORANGE/BLACK
1
239-5B, BLACK
CAB
PANEL
HEADER
CAB LOAD CENTER
CAB
FIREWALL
239-15 , BLACK
239-13 , BLACK
239-12A, BLACK
SH 53
A5-1 , ORANGE/BLACK
A8-1B, BROWN
A5-2 , ORANGE/BLACK
239-14 , BLACK
5-1 , ORANGE/BLACK
25-2, ORANGE/BLACK
NOT USED
A8-1 , BROWN
8-4 , BROWN
789
3
2B
1
6
5B
4
10
CLEARANCE
LAMP
SWITCH
25-1, ORANGE/BLACK
86
30
87A
87
85
S3
8-1 , BROWN 8-5 , BROWN
MARKER
LAMP
8-3 , BROWN
8-2 , BROWN
8
8
CLC3
CHASS1
SH 5
8-1A , BROWN
SH 5
TRAILER LOAD CE NTER
SH 9
WHITE
239-7 ,
, ORN/BLACK
20-1
86
30
MARKER
LAMP
87A
87
85
A5-1A, BLACK
ORANGE/BLACK
5-1B ,
SH 5
MARKER LAMPS
S2S3
8-4B,BROWN
BROWN
,
, BLACK
BROWN
8-6
239-9M
1 HOOD7 8
8-5B,
6
HOOD3
6
8 6
HOOD3-A7
BROWN
BLACK
HOOD3-A6
12
RH
MARKER
LAMP
68
MARKER
LAMP
8-1B, BROWN
BROWN
8-1C ,
S4S5
BROWN
,
8-3B, BROWN
8
BROWN
12
HOOD2
HOOD2-A7
HOOD2-A6
8-2B
1
239-7U, BLACK
BLACK
LH
S6 S7
8-2A, BROWN
CHASS2
C
C
HOOD4
, BROWN
8-1H
S1
8-2G, BROWN
A REP2
8-3A, BROWN
REP1
SPARE
MARKER
8-3H, BROWN
REP3
A
B
RH
TAIL
LAMP
SPARE
MARKER
TLJ1
BROWN
8-4A,
A CHASS9
8-5A, BROWN
8, BLACK
B
TLJ2
LH
TAIL
LAMP
ORANGE
ORANGE 5-2A,
,
5-2AB
LH REPEATERRH REPEATER
PD8b3417.frm
Model 387 Schematics (13 of 59) SK30218 A 1 3
HI BEAM W/LAMP
WARNING
LIGHT
6
BAR
2
5
H
S
E
U
L
B
t
L
,
2
3
5
2
CAB LOAD CENTER
6
LIGHT BAR
, LtBLUE
253-1
BLACK
239-9A ,
HEAD LAMP
SWITCH
789
3
2B
1
6
5B
4
10
HEADLA M P /DRL
DM4-3, LtBLUE
CAB
FIREWALL
CAB PANEL
SH 53
BLACK
LTBLUE
, BLACK
,
,
239-8A
B4-2B
239-12B
BLACK
239-10 ,
TURN
SIGNAL SWITCH
DCAB7 CBA
PARK BRAKE
SWITCH
B5-1, ORANGE/BLACK
B4-3 , LtBLUE
SH 53
SH 52
SH 52
BLACK
BLACK
, LtBLUE
239-15E ,
253-
253-3K , LtBLUE
239-16C,
PASS SIGNAL
SWITCH
789
2B
3
1
5B
6
4
10
B4-1A , LtBLUE
DRLDIS-2A, WHITE/BLACK
DRLDIS-1A, WHITE
42-LH-3 , BLUE/WHITE
E4-1A, LtBLUE/BLACK
A328-1A, LtGREEN
239-38 , BLACK
239-19A , BLACK SH 53
, BLACK
, BLACK
239-17B
239-18B
1
2345678910 CAB13
298-5 , ORANGE
86 30
858787A
B4-1 , LtBLUE B4-2, LtBLUE
DM4-2, LtBLUE
DRLDIS-2, WHITE/BLACK
DRLDIS-1, WHITE/BLACK
43-LH-2 , BLUE/WHITE
E4-1 , LtBLUE/BLACK
A328-1 , LtGREEN
S5
S2
239-14A , BLACK 239-13A , BLACK
S5
228-5 , YELLOW/BLACK
S6
227-5 , GREEN/BLACK
1
5
2
1
5
2
S2
, BLUE/WHITE
239-2RH
239-2LH
A42-LH
S3
HEADLAMP
A4L-1 , LtBLUE
3
DRL LH
4
E4-2 , LtBLUE/BLACK
3
HI BEAM L H
4
239-7B , BLACK
K
E
C
T
I
A
H
L
B
W
/
/
D
E
E
U
R
L
BLUE/ WHITE
B
,
RED/BLACK
,
,
1
-
1
H
L
H
-
L
1
-
4
2
42-RH-1
4
41-RH-1 ,
A4R-1, LtBLUE
20A
1
3
DRL RH
4
5
2
4L-1 , LtBLUE
1
3
HI BEAM RH
4
5
2
8-5G, BROWN
239-1RH
S2
239C, BLACK
A42-RHA, BLUE/WHITE
41-RH, RED/BLACK
42-RH, BLUE/WHITE
41-LH, RED/BLACK
42-LH, BLUE/WHITE
A42-LHA, BLUE/WHITE
239D, BLACK
239-1LH
S4
8-3J , BROWN
20A
DM4-1A, LtBLUE
DM4-2, LtBLUEDM4-2A, LtBLUE
LtBLUE
SH 14
4R-1,
BLACK
239-8 ,
242-6 , RED
242-5 , RED
42-RH-2 , BLUE/WHITE
239-9 , BLACK
BROWN
BLACK
BLACK
BLUE/WHITE
RED
BLUE/WHITE
RED
BLUE/WHITE
BLUE/WHITE
BLACK
BLACK
BROWN
BROWN
S1S5
S1
5A
A42-RH, BLUE/WHITE
SH 14
BROWN
HOOD3-2
2
1
DRL
3
B
RH
A
HEAD LAMP
C
HOOD3-A3
HOOD2-A3
A
LH
C
HEAD LAMP
B
3
1
DRL
2
HOOD2-4
242-7 , RED
1
3
5
2
N
E
E
R
G
t
L
,
2
8
2
3
B
C1 C2 D1 D2B1 B2
A42, BLUE/WHITE
SH 5
D
E
R
,
4
2
4
2
DRL
4
DISABLE
A328-1 , LtGREEN
B328-1 , LtGREEN
SH 14
LtBLUE
,
B4-2
PD8b3417.frm
Model 387 Schematics (14 of 59) SK30218 A 1 4
CAB
LOAD
CENTER
CAB
FIREWALL
A7-2 , PURPLE
298-2AB, ORANGE
27-1 , PURPLE
1
3
FOG LAMP
4
5
2
DISABLE
SH 5
SH 5
SH 52
LtBLUE
,
253-5C
7-3B, PURPLE
FOG LAMP
SWITCH
SH 52
, LtBLUE
253-4E
7
2B
5B
CAB PANEL
SH 53
, BLACK
, BLACK
239-20A
239-22A
9
3
1
6
4
SH 53
BLACK
239-22B ,
A7-1, PURPLE
A7-2, PURPLE
7-3B, PURPLE
PURPLE
,
7-1
1
3
5
2
239-8 , BLACK
239-9 , BLACK
4
FOG LAMP
SH 13
SH 13
7-3 , PURPLE
HOOD5
7-2B, PURPLE
S2
239-12 , BLACK
7-2A, PURPLE
A42, BLUE/WHITE
, PURPLE
SH 13
7-1A, PURPLE
A7-1A
S6
7-3A, PURPLE
239-13H, BLACK
A
B
HOOD6
A
B
LH FOG LAMP
RH FOG LAMP
S3
8
10
FOG LAMPS
PD8b3417.frm
Model 387 Schematics (15 of 59) SK30218 A 1 5
1
382-1A, LtGREEN/REDSH 5
FUEL HEATER
382-1 , LtGREEN/RED
1
HOOD10
FUEL HEATER
2
PD8b3417.frm
Model 387 Schematics (16 of 59) SK30218 A 1 6
HOOD12
AIR DRYER
384-1A , BLUESH 5
384-1 , BLUE
239-4C , BLACK
A
B
S1
AIR
DRYER
PD8b3417.frm
Model 387 Schematics (17 of 59) SK30218 A 1 7
CAB
LOAD
CENTER
CAB
FIREWALL
90-1B , YELLOW/BLUE
637-1B , LtGREEN
636-1B , PURPLE/BLACK
NOT USED
90-1A , YELLOW/BLUE
637-1A , LtGREEN
636-1A , PURPLE/BLACK
542-1A , LtGREEN
LtGREEN
,
542-1
S2
SH 5
CLC3
CHASS1
6
36-1A , GRAY/BLACK
, RED
673-1A
35-1A , GRAY/BLACK
59-1A , VIOLET
239-11B , BLACK
2-1A , TAN/BLACK
6
36-1B , GRAY/BLACK
5
5
35-1B , GRAY/BLACK
7
7
241-1 , GRAY/BLACK
11
11
239-12D , BLACK
12
12
2-1B , TAN/BLACK
326-1A , GREEN
S1 S3
239-6A , BLACK
239-4D , BLACK
239-8B , BLACK
CHASS6
B
A
CHASS4
B
A
CHASS3
A
B
AXLE TEMP
REAR
AXLE TEMP
FORWARD
AUX XMSN
TEMP
327-1A , BLACK
A
CHASS14
F
B
A
AMMETER
NOT AVAILABLE
FUEL TANK
SENDER RH
S2
NOT USED
BLACK
,
326-1B , GREEN
, RED
VIOLET
, GREEN
,
, LtGREEN
673-1
637-1
, PURPLE/BLACK
90-1 , YELLOW/BLUE
636-1
TAN/BLACK
GRAY/BLACK
GRAY/BLACK
59-1
,
35-1 ,
36-1
GRAY/BLACK
GRAY/BLACK
326-1
,
2-1 ,
60-1 ,
327-1
S1
ENG4-B
327-1B
B
A
PYRO
337-1 , BROWN
338-1 , BROWN/BLACK
HOOD14-A
B
A
INTERFACE MODULE
INTERFACE MODULE
KJFBHCAEDG
BLACK
,
239-2D
HOOD9A
BROWN/BLACK
, BROWN
TAN/RED
337-1
338-1 ,
1-1 ,
ACDEFBHOOD10A
239-3C , BLACK
1-1 , TAN/RED
HOOD12-A
B
A
F
LH FUEL TANK
PD8b3417.frm
Model 387 Schematics (18 of 59) SK30218 A 1 8
3
H
5
S
SH 52
LtBLUE
253-8B ,
LtBLUE
,
253-7C
SH 53SH 52
CAB
LOAD
CENTER
239-27C , BLACK
132-1 , RED/TAN
CAB
PANEL
HEADER
239-11C , BLACK
132-1A , RED/TAN
RED/TAN
132-2 , RED/TAN
239-26D , BLACK
A132-1 ,
239-12E , BLACK
789
2B
3
1
6
4
5B
10
SPOT LAMP
SWITCH
SPOT LAMPS
HDR13
21
HDR12
21
PD8b3417.frm
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