Opel Frontera UBS. Service manual — part 676

8D–134

WIRING SYSTEM

Diagnosis

Quick Chart for Check Points

1. Headlight (RHD)

Check point

Trouble mode

Fuse

F–4

(15A)

F–5

(15A)

Lighting

relay

Lighting

SW

Dimmer•

Passing

SW

Cable

harness

Headlight

bulb

1–1. Both Headlights inoperative

1–2. Headlight on the left (or
right) side inoperative

1–3. Both headlights in
low-beam inoperative

1–4. Headlight low-beam on
the left (or right) side
inoperative

1–5. Both headlights in
high–beam inoperative

1–6. Headlight high-beam on the
left (or right) side
inoperative

1–7. Headlight beam does not
change

LH

RH

1–8. Headlights remain on when
the lighting SW is turned off

1–9. Headlights come on with
the lighting SW at the
clearance light position

1–10. Passing lights inoperative

WIRING SYSTEM

8D–135

Check point

Trouble mode

Fuse

F–4

(10A)

F–5

(10A)

Dimmer

relay

Lighting

SW

Dimmer•

Passing

SW

Cable

harness

Headlight

bulb

2–1. Both Headlights
inoperative

2–2. Headlight on the
left (or right) side
inoperative

2–3. Both headlights
in low-beam
inoperative

2–4. Headlight low-
beam on the left
(or right)
side inoperative

2–5. Both headlights
in high-beam
inoperative

2–6. Headlight
high-beam on
the left (or right)
side inoperative

2–7. Headlight beam
does not change

Lighting

relay

F–6

(10A)

F–7

(10A)

2–8. Headlights
remain
on when the
lighting SW is
turned off

2–9. Headlights come
on with the
lighting SW at
the clearance
light position

Diode

2–10. Passing lights
inoperative

LH

RH

2. Headlight (LHD)

8D–136

WIRING SYSTEM

Check point

Trouble mode

Fuse

F–8

(15A or 20A)

Cable

harness

Fog light

bulb

3–1. Both FRT fog lights
inoperative
(while the clearance light is ON)

3–2. FRT fog light on the left
(or rigth) side inoperative
(while the clearance light is ON)

LH

RH

FRT

fog light

SW

FRT

fog light

relay

RR

fog light

SW

RR

fog light

relay

3. FRT fog lights

WIRING SYSTEM

8D–137

1-1. Both Headlights Inoperative

•

IS THE LIGHTING RELAY NORMAL?

YES

•

IS B-19 GROUNDED SECURELY?

YES

REPLACE THE LIGTHING RELAY

NO

•

DISCONNECT THE LIGTHING SW CONNECTOR

•

IS THE BATTERY VOLTAGE APPLIED BETWEEN THE HARNESS
SIDE CONNECTOR 1 B-12 AND GROUND?

YES

GROUND IT SECURELY

NO

•

REMOVE THE LIGHTING SW

•

IS THERE CONTINUITY BETWEEN 1 B-12 AND 7 B-12 WHEN
SETTING THE LIGHTING SW AT THE HEADLIGHT POSITION ?

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSUBLE LINK
FL-1 (80A) AND 1 B-12

NO

YES

REPAIR OR REPLACE THE LIGHTING SW

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN THE HARNESS SIDE CONNECTOR
7 B-12 AND B-19

•

IS THE DIODE NORMAL?

REPLACE THE DIODE

NO

YES