Isuzu KB P190. Manual — part 1292

8A-230 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

Replace the flasher unit

Flasher unit malfunction

NG

Repair or replace the

combination switch

Turn signal switch continuity

between connector

5

B60

- 6

B60

and

5

B60

- 7

B60

when

turn signal switch operates

Short circuit between

connector 3

B61

- 1

B61

when turn signal switch

operates with starter switch

in “ON” position (Turn

signal light should be ON)

Poor switch point contact or

faulty switch

NG

OK

Reinstall or replace fuse No.

EB16 (10A)

Fuse No. EB16 (10A, Fuse

box)

Poor fuse contact or blown

fuse

NG

OK

OK

Repair open circuit or

connector contact

Continuity between

connector 2

B61

-ground

(Should be continuity)

Open circuit or poor connector

contact

NG

ELECTRICAL-BODY AND CHASSIS 8A-231

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

Checkpoint

Trouble

Cause

Countermeasure

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

(LH)
Continuity between
1

C25

- 6

B60

(FRT),

1

C35

- 6

B60

(SIDE)

1

F6

- 6

B60

(RR)

(RH)
Continuity between
1

C22

- 7

B60

(FRT),

1

C1

- 7

B60

(SIDE)

1

F5

- 7

B60

(RR)

Repair or replace the
combination switch

Turn signal switch continuity

Poor switch point contact or
faulty switch

NG

OK

OK

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

3. Hazard warning light does not light

Repair or replace the hazard

SW.

Hazard SW. malfunction

NG

Voltage between 5

B16

-

ground (Should be battery

voltage present)

Hazard SW. continuity

Reinstall or replace the fuse

No. EB-16 (10A)

Fuse No. EB16 (10A, Relay

and fuse box)

Poor fuse contact or blown

fuse

NG

OK

OK

Repair open circuit or

connector contact

Open circuit or poor
connector contact between
fuse No. EB16 (10A) -
5

B16

NG

4. Flashing rate too fast (One side)

Replace the bulb or repair

open circuit

Inspect bulb

Burned out bulb

NG

8A-232 ELECTRICAL-BODY AND CHASSIS

BACKUP LIGHT

1. Backup light does not light on one side (RH or LH)

Checkpoint

Trouble

Cause

Countermeasure

Repair grounding point contact

Poor ground contact

NG

Grounding point

Replace the bulb or repair

connector contact

Backup light bulb continuity

Burned out bulb or poor

connector contact

NG

OK

2. Backup light does not light on both sides

Repair or replace the switch

Poor switch point contact of
faulty switch

NG

Voltage between 5

F6

(5

F5

) - ground with

starter switch ON and shift
lever into reverse position
(Should be battery voltage
present)

Back up light switch (mode
switch) continuity

Reinstall or replace fuse No.
C10 (15A)

Fuse No. C10 (15A, Fuse
box)

Poor fuse contact or blown
fuse

NG

OK

OK

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG

ELECTRICAL-BODY AND CHASSIS 8A-233

HORN

1. Both sides of horn do not sound

Checkpoint

Trouble

Cause

Countermeasure

Repair the grounding point

Poor ground contact

NG

Horn relay

Grounding point

Reinstall or replace fuse No.
EB15 (10A)

Fuse No EB15 (10A, Relay
and fuse box)

Poor fuse contact or blown
fuse

NG

OK

OK

Reinstall or replace the horn
relay

Poor relay contact or faulty
horn relay

NG

Voltage between connector
3

X3

- ground or 1

X3

- ground (Should be battery
voltage present)

OK

Repair open circuit or
reconnect the connector

Open circuit or poor connector
contact between fuse No.
EB15 (10A) and horn relay

NG

Remove steering pad and
steering wheel

OK

Horn switch continuity

OK

Repair or replace the horn
switch

Poor switch point contact or
faulty switch

NG

Continuity between
5

X3

- 10

B60

2

X3

- 1

C20

(1

C21

)

OK

Repair open circuit or
connector contact

Open circuit or poor connector
contact

NG