Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1248

ELECTRICAL-BODY AND CHASSIS  8-331 

CIRCUIT DIAGRAM (LHD) 

 

 

8-332  ELECTRICAL-BODY AND CHASSIS 

CIRCUIT DIAGRAM (RHD) 

 

 

ELECTRICAL-BODY AND CHASSIS  8-333 

TROUBLE SHOOTING 

Rear defogger inoperative 

 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Reinstall or replace the fuse
No. CB-7 (15A) (RHD: fuse
No. CB-5 (15A))

Poor fuse contact or blown

NG

Reinstall or replace the fuse
No. CB-13 (15A)

Fuse No. CB-13 (15A, Fuse
box)

Poor fuse contact or blown

Replace the rear defogger
switch

Rear defogger switch function

Switch malfunction

NG

NG

OK

OK

OK

LHD:
Fuse No. CB-7 (15A, Fuse
box)
RHD:
Fuse No. CB-5 (15A, Fuse
box)

Replace the rear defogger
relay

Relay malfunction

NG

Continued on the next page

Rear defogger relay function

Repair grounding point
(

B-28

) contact

Grounding point (

B-28

)

Poor grounding point contact

NG

OK

Repair open circuit or poor
connector contact between
fuse No. CB-7 (15A) (RHD:
fuse No. CB-5 (15A)) and 2

B-7

, fuse No. CB-13 (15A)

and 5 

B-7

, 1 

B-7

 and 1

L-4

, 4 

B-7

 and 4 

B-15

 or

5 

B-15

 and 

B-28

Voltage between 1 

L-4

-

ground when the starter switch
and the rear defogger switch
are at on position (should be
battery voltage present)

Open circuit or poor connector
contact

NG

OK

 

 

8-334  ELECTRICAL-BODY AND CHASSIS 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

OK

Repair open circuit or
connector contact between 1

L-7

 and 

B-28

Open circuit or poor connector
contact

NG

Continued from the previous page

Continuity between 1 

L-7

and 

B-28

Repair heat wire

Continuity between rear
defogger terminals

Broken heat wire of rear
defogger

NG

OK