Opel Frontera UBS. Service manual — part 678

8D–142

WIRING SYSTEM

REPAIR OR REPLACE THE LIGHTING SW

1-10. Passing Lights Inoperative

•

DISCONNECT THE DIMMER•PASSING SW CONNECTOR

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 5 H-15 AND
14 B-12

REPAIR OR REPLACE THE SWITCH

NO

•

WITH THE SWITCH AT PASSING POSITION, IS THERE
CONTINUITY BETWEEN THE SWITCH CONNECTOR TERMINALS
14 B-12 AND 16 B-12 , AND 15 B-12 AND 16 B-12 ?

1-9. Headlights Come On With The Lighting SW At The Clearance Light Position

WIRING SYSTEM

8D–143

2-1. Both Headlights Inoperative

•

IS THE LIGHTING RELAY NORMAL?

YES

REPLACE THE RELAY

NO

•

IS B-19 GROUNDED SECURELY?

YES

NO

GROUND IT SECURELY

•

IS THE DIODE NORMAL ?

YES

NO

REPLACE THE DIODE

•

IS THE DIMMER RELAY NORMAL?

YES

NO

REPLACE THE RELAY

•
•

DISCONNECT THE LIGHTING SW CONNECTOR

YES

NO

•
•

REMOVE THE LIGHTING SW

YES

NO

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

REPAIR OR REPLACE THE LIGHTING SW

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

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

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

8D–144

WIRING SYSTEM

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

•

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

YES

REPLACE THE BULB

NO

•

IS 7 C-39 (OR 5 C-39 ) GROUNDED SECURELY? (RH)
IS 4 C-39 (OR 7 C-16 ) GROUNDED SECURELY? (LH)

YES

NO

GROUND IT SECURELY

REPAIR AN OPEN CIRCUIT BETWEEN
3 C-32 AND 7 C-39 (OR 5 C-39 ) (RH)
3 C-21 AND 4 C-39 (OR 7 C-16 ) (LH)

•

IS THE DIMMER RELAY NORMAL?

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 X-3 AND FUSE F-6 (10A)

NO

REPLACE THE RELAY

2-3. Both Headlights In Low-Beam Inoperative

WIRING SYSTEM

8D–145

2-4. Headlight Low-Beam On The Left (Or Right) Side Inoperative

2-5. Both Headlights In High-Beam Inoperative

•

IS THE HEADLIGHT BULB NORMAL?

YES

NO

REPLACE THE BULB

•

IS THE FUSE F-6 (10A) (OR F-7 (10A)) NORMAL?

YES

REPAIR A POOR CONNECTION AT THE CONNECTORS OR
AN OPEN CIRCUIT BETWEEN FUSE F-6 (10A) AND 1 C-21
(OR FUSE F-7 (10A) AND 1 C-32 )

NO

REPLACE THE FUSE

•

IS THE DIMMER RELAY NORMAL?

YES

NO

REPLACE THE RELAY

•

•

DISCONNECT THE DIMMER·PASING SW CONNECTOR
IS THERE ANY CONTINUITY BETWEEN THE SWITCH SIDE
CONNECTOR 15 B-12 AND 16 B-12 WHEN THE
SWITCH IS AT HIGH-BEAM POSITION?

YES

NO

REPAIR OR REPLACE THE SWITCH

•

IS THE BATTERY VOLTAGE APPLIED BETWEEN THE
HARNESS SIDE CONNECTOR 15 B-12 AND GROUND
WHEN THE SWITCH IS AT HIGH-BEAM POSITION?

YES

NO

REPAIR A POOR CONNECTION AT THE CONNEC-
TORS OR AN OPEN CIRCUIT BETWEEN 5 X-3
AND 15 B-12

REPAIR A POOR CONNECTION AT THE CONNECTOR OR AN
OPEN CIRCUIT BETWEEN 3 X-3 AND FUSE F-4 (10A)