Opel Frontera UE. Manual - part 1093

8D–83

WIRING SYSTEM

Diagnosis

Both Headlights Inoperative

Step

Action

Value(s)

Yes

No

1

Check the ground terminal B–8.

Is B–8 grounded securely?

—

Go to Step 2

Ground it

securely

2

Disconnect the combination switch connector I–32.

Is there continuity between switch side connector I–32
terminals 9 and 2 with the switch turned to headlight
position?

—

Go to Step 2 

Replace the

switch

3

Check continuity of dimmer-passing switch.

Is there continuity between switch side connector I–32
terminal 5 and 4 with the switch turned to low position,
and terminal 1 and 4 with the switch turned to high
position?

—

Go to Step 3 

Replace the

switch

4

Check continuity between the lighting switch and the
ground B–8.

Is there continuity between harness side connector
I–32 terminal 2 and the ground?

—

Go to Step 5

Repair an

open circuit

5

Remove the lighting relay from the relay and fuse box.

Is the battery voltage applied between harness side
connector X–1 terminal 5 and the ground, X–1 terminal
2 and the ground?

Approx. 12V

Go to Step 6

Repair an

open circuit

between

battery and

the lighting

relay

6

Check continuity between the lighting relay and the
lighting switch.

Is there continuity between harness side connector
X–1 terminal 4 and I–32 terminal 9?

—

Go to Step 7

Go to Step 6

7

Check continuity between the lighting relay and fuse
F–8 or F–9.

Is there continuity between harness side connector
X–1 terminal 3 and fuse F–8 or F–9?

—

Go to Step 8

Repair an

open circuit

8

Check continuity between the dimmer-passing switch
and the ground.

Is there continuity between switch side connector I–32
terminal 4 and the ground B–8?

—

Repair an

open circuit

—

Headlight On The Left (or Right) Side Inoperative

Step

Action

Value(s)

Yes

No

1

Is the fuse F–8 or F–9  normal?

—

Go to Step 2

Replace the

fuse

2

Remove the headlight bulb on the left or right side.

Is the bulb normal?

—

Go to Step 3

Replace the

bulb

3

1. Reinstall the bulb.
2. Turn the lighting switch to headlight position.

Is the battery voltage applied between harness side
connector C–21 terminal 3 and the ground or C–10
terminal 3 and the ground?

Approx. 12V

Reconnect

the headlight

connector

securely

Repair an

open circuit

between the

fuse and

headlight

8D–84

WIRING SYSTEM

Headlights In Low–Beam Inoperative

Step

Action

Value(s)

Yes

No

1

Disconnect the combination switch connector I–32.

Is there continuity between switch side connector I–32
terminal 5 and 4 with the switch at low-beam position?

—

Go to Step 2

Repair or

replace the

switch

2

Repair an open circuit between  connector H-13
terminal 15 and  connector I-32 terminal 5.

Is the action complete?

—

Verify repair

—

Headlight In High–Beam Inoperative

Step

Action

Value(s)

Yes

No

1

Disconnect the combination switch connector I–32.

Is there continuity between switch side connector I–32
terminal 1 and 4 with the switch at high-beam position?

—

Go to Step 2

Repair or

replace the

switch

2

Repair an open circuit between connector H–13
terminal 14 and connector I–32 terminal 1.

Is the action complete?

—

Verify repair

—

Headlights Remain On When Lighting Switch Turned Off

Step

Action

Value(s)

Yes

No

1

1. Turn the lighting switch to off position.
2. Disconnect the combination switch connector I–32.

Do the headlights still remain on?

—

Go to Step 3

Go to Step 2

2

Repair or replace the lighting switch.

NOTE: There should be no continuity between switch
side connector I–32 terminal 9 and 2.

Is the action complete?

—

Go to Step 1

—

3

Remove the lighting relay.

Is there continuity between the relay side connector
X–1 terminal 1 and 5?

—

Replace the

relay

Go to Step 4

4

Repair short circuit between the lighting relay and the
lighting switch.

Is the action complete?

—

Verity repair

—

Headlight Comes On With Lighting Switch At Parking Light Position

Step

Action

Value(s)

Yes

No

1

Repair or replace the lighting switch.

NOTE: There should be no continuity between switch
side connector I–32 terminal 9 and 2 when the switch is
turned to parking light position.

Is the action complete?

—

Verify repair

—

8D–85

WIRING SYSTEM

(While Headlight Is On In Low–Beam) Both Fog Lights Inoperative

Step

Action

Value(s)

Yes

No

1

Are the fuse F–10 and C–4 normal?

—

Go to Step 2

Replace the

fuse(s)

2

Is C–36 grounded securely?

—

Go to Step 3

Ground it

securely

3

Remove the foglight relay.

Is the battery voltage applied between harness side
connector X–2 terminal 5 and the ground?

Approx. 12V

Go to Step 5

Go to Step 4

4

Repair an open circuit between Fuse F–10 connector
X–2 terminal 5.

Is there action complete?

—

Go to Step 3

—

5

Is there continuity between harness side connector
X–2 terminal 4 and the ground?

—

Go to Step 7

Go to Step 6

6

Repair an open circuit between connector X–2 terminal
4 and the ground C–36.

Is the action complete?

—

Go to Step 5

—

7

1. Turn the lighting switch to clearance light position.
2. Turn the fog light switch on.

Is the battery voltage applied between harness side
connector X–2 terminal 2 and the ground?

Approx. 12V

Replace the

fog light relay

Go to Step 8

8

Disconnect the lighting switch connector I–32.

Is there continuity between the switch side connector
terminal  2 and 3?

—

Go to Step 9

Repair or

replace the

switch.

9

Disconnect the tail relay.

Is there continuity between harness side connector
I–32 terminal 3 and I–32 terminal 3?

—

Go to Step 10

Repair an

open circuit

10

Is the battery voltage applied between harness side
connector I–34 terminal 2, 4 and the ground?

Approx. 12V

Go to Step 12

Go to Step 11

11

Repair an open circuit between the fuse C–4 and
connector I–34 terminal 2 or 4.

Is the action complete?

—

Go to Step 10

—

12

1. Disconnect the fog light switch.
2. Turn the switch on.

Is there continuity between the switch terminal 3 and 4?

—

Go to Step 13

Repair or

replace  the

switch

13

Is there continuity between harness side connector I–5
terminal 4 and connector I–34 terminal 1?

—

Go to Step 14

Repair an

open circuit

14

Is there continuity between harness side connector I–5
terminal 3 and connector X–2 terminal 2?

—

Replace the

tail relay

Repair an

open circuit

8D–86

WIRING SYSTEM

(While Headlight Is On In Low–Beam) Fog Light On the Left (or Right) Side Inoperative

Step

Action

Value(s)

Yes

No

1

Is the fog light bulb on the left or right side normal?

—

Go to Step 2

Replace the

bulb

2

Is C–16 or C–36 grounder securely?

—

Go to Step 3

Ground it

Securely

3

Disconnect the fog light connector C–22 or C–17.

Is there continuity between the fog light harness side
connector terminal 2 and the ground?

—

Go to Step 4

Repair an

open circuit

4

Repair an open circuit between fog light relay
connector X–2 terminal 1 and fog light connector
terminal 1.

Is the action complete?

—

Verify repair

—