Opel Frontera UBS. Service manual — part 677

8D–138

WIRING SYSTEM

1-2. Headlight On The Left (Or Right) Side Inoperative

1-3. Both Headlights In Low-Beam Inoperative

YES

•

IS THE HEADLIGHT BULB ON THE LEFT (OR RIGHT)
SIDE NORMAL?

YES

REPLACE THE FUSE

NO

•

IS THE FUSE F-4 (15A) (OR F-5 (15A)) NORMAL?

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN
FUSE F-4 (15A) AND 3 C-21 (LH)
FUSE F-5 (15A) AND 3 C-32 (RH)

REPLACE THE BULB

NO

•

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN
13 B-12 AND 10 H-15

REPAIR OR REPLACE THE DIMMER•PASSING SW

NO

•

WITH THE SWITCH AT THE LOW-BEAM POSITION, IS
THERE CONTINUITY BETWEEN THE SW CONNECTOR
TERMINALS 13 B-12 AND 16 B-12

DISCONNECT THE DIMMER•PASSING SW CONNECTOR
(COMBINATION SW)

WIRING SYSTEM

8D–139

1–4. Headlight Low-Beam On The Left (Or Right) Side Inoperative

•

IS THE HEADLIGHT BULB ON THE
LEFT (OR RIGHT) SIDE NORMAL?

YES

•

IS THE FUSE F–4 (15A) (OR F–5 (15A))
NORMAL?

YES

REPLACE THE BULB

NO

•

DISCONNECT THE DIMMER·PASSING SW CONNECTOR

•

WITH THE SWITCH AT THE LOW–BEAM POSITION, IS THERE
CONTINUITY BETWEEN 13 B–12 AND 16 B–12 ?

YES

REPLACE THE FUSE

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 3 C–21 AND F–4
(15A) (OR 3 C–32 AND F–5 (15A))

NO

REPAIR OR REPLACE THE DIMMER·PASSING SW

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 13 B–12 AND 1 C–21 (OR 13 B–12
AND 1 C–32 )

•

IS THE CONTINUITY BETWEEN
3 C–21 AND F–4 (15A) (OR 3 C–32
AND F–5 (15A)) NORMAL?

NO

YES

8D–140

WIRING SYSTEM

1–5. Both Headlights In High-Beam Inoperative

•

DISCONNECT THE DIMMER•
PASSING SW CONNECTOR (COMBINATION SW)

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN
15 B-12 AND 16 H-16

REPAIR OR REPLACE THE DIMMER•
PASSING SW

NO

•

WITH THE SWITCH AT HIGH-BEAM, IS THERE
CONTINUITY BETWEEN THE SWITCH CONNECTOR TERMINALS
15 B-12 AND 16 B-12 ?

1–6. Headlight High-Beam On The Left (Or Right) Side Inoperative

•

IS THE HEADLIGHT BULB ON THE
LEFT (OR RIGHT) SIDE NORMAL?

YES

•

IS THE FUSE F–4 (15A) (OR F–5 (15A))
NORMAL?

YES

REPLACE THE BULB

NO

•

DISCONNECT THE DIMMER·PASSING SW CONNECTOR

•

WITH THE SWITCH AT THE HIGH–BEAM POSITION, IS THERE
CONTINUITY BETWEEN 15 B–12 AND 16 B–12 ?

YES

REPLACE THE FUSE

NO

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 3 C–21 AND F–4
(15A) (OR 3 C–32 AND F–5 (15A))

NO

REPAIR OR REPLACE THE DIMMER·PASSING SW

REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 15 B–12 AND 2 C–21 (OR 15 B–12
AND 2 C–32 )

•

IS THE CONTINUITY BETWEEN
3 C–21 AND F–4 (15A) (OR 3 C–32
AND F–5 (15A)) NORMAL?

NO

YES

WIRING SYSTEM

8D–141

1-7. Headlight Beam Does Not Change

1-8. Headlights Remain On When The Lighting SW Is Turned Off

YES

•

DISCONNECT THE DIMMER•PASSING
SW

REPAIR OR REPLACE THE DIMMER•PASSING SW

NO

•

DOES THE LEVER OF THE DIMMER•
PASSING SW OPERATE SMOOTHLY AND SECURELY?

•

WITH THE SWITCH AT THE LOW-BEAM POSITION, IS
THERE CONTINUITY BETWEEN 13 B-12 AND 16 B-12 ?
ALSO, WITH IT AT THE HIGH-BEAM POSITION, IS THERE
CONTINUITY BETWEEN 15 B-12 AND 16 B-12 ?

NO

REPAIR OR REPLACE THE DIMMER•PASSING SW

YES

•

REPLACE THE LIGHTING RELAY

NO

•

IS THE LIGHTING RELAY NORMAL?

REPAIR OR REPLACE THE LIGHTING SW

NO

DISCONNECT THE LIGHTING SW CONNECTOR

•

IS THE CONTINUITY BETWEEN
THE SWITCH CONNECTOR TERMINALS 1 B-12 AND
7 B-12 NORMAL?

YES

REPAIR A SHORT CIRCUIT BETWEEN
5 X-1 AND 1 B-12