Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1307

8–148 ELECTRICAL-BODY AND CHASSIS

TROUBLE SHOOTING

STOPLIGHT AND HIGH MOUNTED STOPLIGHT

1.

One side of stoplight does not light

Checkpoint

Trouble Cause

Countermeasure

Burned out bulb or poor
connector contact

Replace the bulb or repair
connector contact 

Stoplight bulb continuity

Open circuit or poor
connector contact

Repair open circuit or
connector contact

LHD:

Continuity between 

8 H-8   - 2  T-1   (LH) (or 

2   T-6   (RH))

RHD:

Continuity between 

18 H-6   - 2  T-1   (LH) (or 

2   T-6   (RH))

Open circuit or poor
connector contact

Repair open circuit or
connector contact

Continuity between 

F-3  - 4   T-1 (LH) (or 

4 T-6 (RH))

OK

OK

NG

NG

NG

2.

Both sides of stoplight do not light

Poor fuse contact or blown

Reinstall or replace fuse
No. EB-11 (10A)

Fuse No. EB-11 (10A, Fuse
and Relay box)

Incorrect the switch
installation or adjustment

Adjust the switch
installation position

Stop light switch (or brake
switch) function

Open circuit or poor
connector contact between
stoplight switch (or brake
switch) and stoplight

Repair open circuit or
connector contact

Voltage between 2  T-1  -
ground or 2  T-6   - ground
with brake pedal depressed
(Should be battery voltage
present)

OK

OK

NG

NG

NG

ELECTRICAL-BODY AND CHASSIS 8–149

3.

High mounted stoplight does not light

Checkpoint

Trouble Cause

Countermeasure

Poor grounding point
contact

Repair grounding point 
(  B-28  ) contact

Grounding point (  B-28  )

High mounted stoplight
malfunction

Repair or replace the high
mounted stoplight

Continuity between 1  L-5   -
1  L-6

NG

OK

NG

Open circuit or poor
connector contact

Repair an open circuit or
connector contact between
1  L-5  - 8  H-8

Voltage between 1  L-5   -
ground with brake pedal
depressed
(Should be battery voltage
present)

OK

NG

8–150 ELECTRICAL-BODY AND CHASSIS

TURN SIGNAL LIGHT AND HAZARD WARNING LIGHT

1.

Turn signal light does not light on both sides (RH and LH)

Checkpoint

Trouble Cause

Countermeasure

Poor fuse contact or blown
fuse

Reinstall or replace fuse
No. CB-11 (15A)

Fuse No. CB-11 (15A, Fuse
box)

Flasher unit malfunction

Replace the flasher unit

Short circuit between
connector 1 C-45 - 2 C-45
when turn signal switch
operates with starter switch
in “ON” position (Turn
signal light should be ON)

NG

OK

NG

Open circuit or poor
connector contact

Repair open circuit or
connector contact

Continuity between
connector 3 C-45 -ground
(Should be continuity)

OK

NG

Poor switch point contact
or faulty switch

Repair or replace the
combination switch

Turn signal switch continuity
between connector

3 C-42 - 4 C-42 and 

3 C-42 - 5 C-42 when

turn signal switch operates

OK

NG

2.

Turn signal light does not light on one side (RH or LH)

Poor switch point contact
or faulty switch

Repair or replace the
combination switch

Turn signal switch
continuity

Open circuit or poor
connector contact

Repair open circuit or
connector contact

(RH)
Continuity between 

2 C-22 - 5 C-42  (FRT), 

1  C-1  - 5  C-42  (SIDE)

1   T-6  - 5 C-42  (RR)

Open circuit or poor
connector contact

Repair open circuit or
connector contact

(LH)
Continuity between 

2 C-25  - 4 C-42  (FRT), 

1  C-35  - 4  C-42  (SIDE)

1   T-1  - 4 C-42  (RR)

OK

OK

NG

NG

NG

ELECTRICAL-BODY AND CHASSIS 8–151

3.

Hazard warning light does not light

4.

Flashing rate too fast (One side)

Checkpoint

Trouble Cause

Countermeasure

Poor fuse contact or blown
fuse

Reinstall or replace the fuse
No. EB-1 (15A)

Fuse No. EB-1 (15A, Relay
and fuse box)

Hazard SW. malfunction

Repair or replace the
hazard SW.

Hazard SW. continuity

NG

OK

NG

Open circuit or poor
connector contact between
fuse No. EB-1 (15A) – 
2  B-16  

Repair open circuit or
connector contact

Voltage between 2  B-16  -
ground (Should be battery
voltage present)

OK

NG

Burned out bulb

Replace the bulb or repair
open circuit

Inspect bulb

NG