ISUZU TROOPER 1998 Service Repair Manual

8DÐ208 WIRING SYSTEM
Stoplight
General Description
The circuit consists of the stoplight, stoplight switch
(vehicles w/o cruise control), brake switch (vehicles
w/ cruise control).
With the brake pedal depressed, the stoplight switch
or the brake switch is turned on to illuminate the
stoplight. The brake switch controls not only the
operation of the stoplight but also the input of the
cruise cancel signals to the cruise control unit.

WIRING SYSTEM 8DÐ209
5.0
W
0.85
G/W0.85
G/W (W/CRUISE CONTROL)
0.85
G/Y 0.85
G/Y
0.85
G/Y
0.85
G/Y
0.85
G/Y 0.85
G/Y
3.0
B
0.5
B 3.0
B 0.5
B
1.25
B
1.25
BBATT.(+)
STOPLIGHT
SW
STOPLIGHT
-LH(BODY)
HIGH MOUNTED
STOPLIGHTBRAKE SW
C-14 15A
STOP,A/T CONT
B-14
2 1
B-131
B-132
A
B-14
4
B-13
3
B-13
H-327R-135
R-13
10.85
G/Y
STOPLIGHT
-RH(BODY)
R-125
R-12
1
R-4
A
R-3
BODY-RR BODY-RRH-374
H-371G-9 G-9
2 1
AH-37
BODY-RR (W/O RR WIPER
AND/OR RR DEFOGGER)
0.5
B
3.0
B4R-3
D08RW989
Circuit Diagram (RHD)

8DÐ210 WIRING SYSTEM
5.0
W
0.85
G/W0.85
G/W (W/CRUISE CONTROL)
0.85
G/Y 0.85
G/Y
0.85
G/Y
0.85
G/Y
0.85
G/Y 0.85
G/Y
3.0
B
0.5
B 3.0
B 0.5
B
1.25
B
1.25
BBATT.(+)
STOPLIGHT
SW
STOPLIGHT
-LH(BODY)
HIGH MOUNTED
STOPLIGHTBRAKE SW
C-14 15A
STOP,A/T CONT
B-14
2 1
B-131
B-132
A
BA
B-14
4
B-13
3
B-13
H-327R-135
R-13
10.85
G/Y
STOPLIGHT
-RH(BODY)
R-125
R-12
1
R-4
A
R-3
BODY-RR BODY-RRH-374
H-371G-9 G-9
2 1
AH-37
BODY-RR (W/O RR WIPER
AND/OR RR DEFOGGER)
0.5
B
3.0
B4R-3
D08RW658
Circuit Diagram (RHD)-1

WIRING SYSTEM 8DÐ211
0.85
G/Y
0.85
G/Y
1.25
B
1.25
B
1.25
B 1.25
B 1.25
B
2F-83 6
F-8
H-33 0.85
G/Y
0.85
G/Y
0.85
G/Y
0.85
G/Y10
H-33
STOPLIGHT
-RH(BUMPER)
2F-7
H-333F-7
STOPLIGHT
-LH(BUMPER)
TRAILER HARNESS
CONNECTOR
(STOP LIGHT)
AB5
H-44
4
H-44
6
H-3320
D08RW874
Circuit Diagram (RHD)-2

8DÐ212 WIRING SYSTEM
Parts Location (RHD)
Legend
(1) G-9
(2) High Mounted Stoplight
(3) B-13 or B-14
(4) H-32
(5) Stoplight-RH (Body)
(6) R-12
(7) Stoplight-RH (Bumper)(8) F-8
(9) F-7
(10) Stoplight-LH (Bumper)
(11) H-33
(12) H-37
(13) Stoplight-LH (Body)
(14) R-13
(15) R-3, R-4
1
2
3
4
56
8
7
910
11
12
13
14
15
D08RW877

WIRING SYSTEM 8DÐ213
5.0
W
0.85
G/W0.85
G/W (W/CRUISE CONTROL)
0.85
G/Y 0.85
G/Y
0.85
G/Y
0.85
G/Y
0.85
G/Y 0.85
G/Y
1.25
B
3.0
B
0.5
B 3.0
B 0.5
B
1.25
B BATT.(+)
STOPLIGHT
SW
STOPLIGHT
-LH
HIGH MOUNTED
STOPLIGHTBRAKE SW
C-14 15A
STOP,A/T CONT
B-14
2 1
B-131
B-132
A
B-14
4
B-13
3
B-13
H-327R-135
R-13
10.85
G/Y
STOPLIGHT
-RH
R-125
R-12
1
R-4
A
R-3
BODY-RR BODY-RRH-374
H-371G-9 G-9
2 1
AH-37
BODY-RR (W/O RR WIPER
AND/OR RR DEFOGGER)
0.5
B
3.0
B4R-3
D08RW953
Circuit Diagram (LHD)

8DÐ214 WIRING SYSTEM
5.0
W
0.85
G/W0.85
G/W (W/CRUISE CONTROL)
0.85
G/Y 0.85
G/Y
0.85
G/Y
0.85
G/Y
0.85
G/Y
0.85
G/Y 0.85
G/Y
3.0
B
0.5
B 3.0
B 0.5
B
1.25
B/L
1.25
B/L
1.25
BBATT.(+)
STOPLIGHT
SW
STOPLIGHT
-LH(BUMPER)
HIGH MOUNTED
STOPLIGHTBRAKE SW
C-14 15A
STOP,A/T CONT
B-14
2 1
B-131
B-132
A
B-14
4
B-13
3
B-13
H-327
3H-33102
H-33
F-70.85
G/Y
0.85
G/Y
6
STOPLIGHT
-RH(BUMPER)
R-4
A
R-3
BODY-RR BODY-RRH-374
H-371G-9 G-9
2 1
AH-37
BODY-RR (W/O RR WIPER
AND/OR RR DEFOGGER)
0.5
B
3.0
B4R-3
F-8
2
F-73
H-331F-8
D08RW939
Circuit Diagram (LHD W/Bumper Built-in Type Stoplight)

WIRING SYSTEM 8DÐ215
Parts Location (LHD)
12
3
4
5
7
6
891011
12
13
14
1516
D08RW940
Legend
(1) G-9
(2) High Mounted Stoplight
(3) Stoplight-RH (Body)
(4) R-12
(5) Stoplight-RH (Bumper)
(6) F-8
(7) Stoplight-LH (Bumper)
(8) F-7(9) H-33
(10) H-37
(11) Stoplight-LH (Body)
(12) R-13
(13) R-3, R-4
(14) H-32
(15) Fuse Box
(16) B-13 or B-14

8DÐ216 WIRING SYSTEM
DIAGNOSIS
Quick Chart for Check Points
Check pointFuse
C-14 (15A)Cable
harness
1 Both stoplights inoperative Trouble mode
2 Stoplight on the left (or right) side inoperative
Stoplight
SW or
brake SWStoplight
bulb
High mounted stoplight inoperative3
High mount
stoplight
ASM

WIRING SYSTEM 8DÐ217
1 Both Stoplights Inoperative
·IS THE BATTERY VOLTAGE APPLIED TO 1 B-14 (1 B-13 )
OF THE STOPLIGHT SW (OR THE BRAKE SW)?
YES
YES
REPLACE THE FUSE
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C-14 (15A)
AND 1 B-14 (1 B-13 )
NO
·IS FUSE C-14 (15A) NORMAL?
·IS R-4 GROUNDED SECURELY?
GROUND IT SECURELY
YESNO
·REMOVE THE STOPLIGHT SW (OR THE BRAKE SW) CONNECTOR.
·WHEN DEPRESS THE BRAKE PEDAL, IS THERE ANY
CONTINUITY BETWEEN THE 1 B-14 AND 2 B-14
(OR 1 B-13 AND 4 B-13 ) OF THE SWITCH?
DOES THE PUSH ROD OF THE STOPLIGHT SW (OR THE
BRAKE SW ) OPERATE SMOOTHLY?
YESNO
·REPLACE THE STOPLIGHT SW (OR BRAKE SW)
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 2 B-14 (4 B-13 ) AND 7 H-32
YESNO
REPLACE THE STOPLIGHT SW (OR BRAKE SW)