alarm ISUZU TROOPER 1998 Service Owner's Guide

8D – 336 WIRING SYSTEM
Diagnosis
Quick Chart for Check Points
1. Headlight wipers and washer do not
operate on either side
2. Wiper on the left (or right) side does
not operate
3. Auto-stop function of the wiper on the
left (or right) side does not operate
4. Wiper on the left (or right) side does
not stop
5. Washer motor does not operate
Trouble modeCheck point
C-7 C-4Fuse
Headlight
wiper SWHeadlight
wiper
motorHeadlight
washer
motorCable
harness Alarm &
relay
control unit

WIRING SYSTEM 8D – 341
5. Washer Motor Does Not Operate
•DISCONNECT THE HEADLIGHT WASHER MOTOR
CONNECTOR
YES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 1 C-36 AND FUSE C-7 (10A)
NO
•CONNECT THE MOTOR SIDE CONNECTOR
TERMINAL 1 C-36 TO THE BATTERY (+)
TERMINAL, AND 2 C-36 TO THE (–) TERMINAL
YES
REPAIR OR REPLACE THE MOTOR
NO
•DISCONNET THE ALARM & RELAY CONTROL
UNIT CONNECTOR B-6
•TURN THE STARTER SWITCH ON
YES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN FUSE C-4 (10A) AND 1 B-6
NO
•TURN THE STARTER SWITCH ON
•IS THERE BATTERY VOLTAGE APPLIED
BETWEEN THE WASHER MOTOR HARNESS SIDE
CONNECTOR 1 C-36 AND THE GROUND?
•DOES THE MOTOR ROTATE?
•IS THERE BATTERY VOLTAGE APPLIED BETWEEN
THE CONTROL UNIT HARNESS SIDE CONNECTOR
1 B-6 AND THE GROUND?
•RECONNECT THE HEADLIGHT WASHER MOTOR CONNECTOR
YESNO
•IS FUSE C-4 (10A) NORMAL?
YES
REPLACE THE FUSE
NO
•IS THERE CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTORS 12 B-6 AND 5 C-23
YESNO
REPLACE THE ALARM & RELAY CONTROL UNITREPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN
THE CIRCUIT
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT
BETWEEN 2 C-36 AND 10 B-7
•IS THERE BATTERY VOLTAGE APPLIED BETWEEN THE
HARNESS SIDE CONNECTOR 10 B-7 AND THE GROUND?

8D – 342 WIRING SYSTEM
Rear Defogger
General Description
When rear defogger switch is turned on with starter
switch on, battery voltage is applied to rear defogger
through rear defogger relay to operate rear defogger.
Alarm & relay control unit is provided with a timer.
When the operation time of the timer elapses which
has been set in advance at manufacture, the switch is
automatically turned off. (The timer operating time is
normally about 30 minutes).

WIRING SYSTEM 8D – 343
Circuit Diagram (RHD)
%38
5.0
W BATT.(+)
C-17 25A
RR DEFOG
3.0
B/Y STARTER SW
(IG1)
C-4 10A
ELEC. IGN.
3.0
L/W
3.0
B/L
3.0
B/L
3.0
B/L
3.0
B
3.0
B2.0
B 0.85
B
2.0
B2.0
B
RR DEFOGGER
RELAY
RR DEFOGGER
SW
RR DEFOGGER
B-38
B-38 0.5
L/W
2
B-38
3
41B-38
0.5
O/L0.5
O/L
0.5
O/L0.5
O/L
0.5
O/G0.5
O/G0.3
R/G 0.85
G/R
0.85
L/W0.5
L/W0.5
L/W
ALARM & RELAY
CONTROL UNIT
(RR DEFOGGER)
B-7
5
B-7
8
9B-6
G-7
1H-37
1G-32
2H-31
4H-37R-3
BODY-RR BODY-LH BODY-RHBODY-CTR
B-2
B-26
B-18
TIMER
I-17
3
I-17
4H-2520
I-17
ILLUMINATION
CONTROLLER(3)2
5
I-17
2
H-26
6
I-17 TAIL RELAY(4)
1
H-25

8D – 344 WIRING SYSTEM
Parts Location (RHD)
Legend
(1) I-17 (Rear Defogger Switch)
(2) Starter Switch
(3) H-25, H-26
(4) B-19
(5) Fuse Box (B-38)
(6) B-26
(7) G-7(8) H-37
(9) R-3
(10) Rear Defogger
(11) G-3
(12) H-31
(13) B-2
(14) B-6, B-7 (Alarm and Relay Control Unit)
8 9 10
11
12
131412
3
4
5
6
7
%38

WIRING SYSTEM 8D – 345
Circuit Diagram (LHD)
5.0
W BATT.(+)
C-17 25A
RR DEFOG
3.0
B/Y STARTER SW
(IG1)
C-4 10A
ELEC. IGN.
3.0
L/O
3.0
B/L
3.0
B/L
3.0
B/L
3.0
B
3.0
B2.0
B 0.85
B
2.0
B2.0
B
RR DEFOGGER
RELAY
RR DEFOGGER
SW
RR DEFOGGER
B-38
B-38 0.5
L/W
2
B-38
3
41B-38
0.5
O/L0.5
O/L
0.5
O/L0.5
O/L
0.5
O/G0.5
O/G0.3
R/G 0.85
G/R
0.85
L/W0.5
L/W0.5
L/W
ALARM & RELAY
CONTROL UNIT
(RR DEFOGGER)
B-7
5
B-7
8
9B-6
G-7
1H-37
1G-32
2H-31
4H-37R-3
BODY-RR BODY-RH BODY-LHBODY-CTR
B-2
B-26
B-18
TIMER
I-17
3
I-17
4H-255
I-17
ILLUMINATION
CONTROLLER(3)2
5
I-17
3
H-25
6
I-17 TAIL RELAY(4)
1
H-48
%38

8D – 346 WIRING SYSTEM
Parts Location (RHD)
Legend
(1) H-48
(2) B-2
(3) G-7
(4) Rear Defogger
(5) G-3
(6) H-37
(7) R-3
(8) H-31(9) B-26
(10) Fuse Box
(11) B-38
(12) B-18
(13) H-25
(14) Starter Switch
(15) I-17 (Rear Defogger Switch)
(16) B-6, B-7 (Alarm and Relay Control Unit)
%38
9
8
7
65
4
3
21 161514
13
12
11
10

WIRING SYSTEM 8D – 347
Diagnosis
Quick Chart for Check Points
Check pointFuse
C-4
(10A)C-17
(25A)Rear
defogger
relayAlarm &
relay
control
unitCable
harness
1 Rear defogger does not operateTrouble mode
2 Rear defogger timer does not function
Rear
defogger
SW

8D – 348 WIRING SYSTEM
1 Rear Defogger Does Not Operate
•IS THE REAR DEFOGGER SWITCH NORMAL?
YES
YES
REPLACE THE FUSE
NO
NO
•ARE THE FUSES C-4 (10A) AND C-17
(25A) NORMAL?
•IS THE REAR DEFOGGER RELAY NORMAL?
REPLACE THE RELAY
YESNO
TURN ON THE STARTER SWITCH AND THE REAR DEFOGGER
SWITCH
YESNO
•
GROUND IT SECURELY
YESNO
•IS R-3 GROUNDED SECURELY? REPAIR OR REPLACE THE SWITCH
IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE REAR
DEFOGGER CONNECTOR 1 G-3 AND THE GROUND? •
YES
REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT IN
EACH OF THE FOLLOWING
CONNECTIONS: FUSE C-17 (25A) AND
2 B-38 , FUSE C-4 (10A) AND 3 B-38 ,
4 B-38 AND 1 G-3 , 4 I-17
AND 8 B-6 , 5 I-17 AND FUSE C-4 (10A)
NO
•IS THERE CONTINUITY BETWEEN 1 G-7
AND THE GROUND?
REPLACE THE ALARM & RELAY CONTROL
UNITREPAIR A POOR CONNECTION AT THE
CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 1 G-7
AND R-3

WIRING SYSTEM 8D – 349
2 Rear Defogger Timer Does Not Function
REPLACE THE ALARM & RELAY CONTROL UNIT