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For 1990-2009 cars only

Fog Lamps Inoperative - All Pont, Chevy Dom, Gulf States, Japan

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the headlamps on.
  2. Turn the fog lamp switch on.
  3. Turn the headlamp dimmer switch to the low beam position.

Do the fog lamps illuminate?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Leave the headlamps on.
  2. Leave the foglamps on.
  3. Leave the headlamp dimmer switch in the low beam position.
  4. Connect a test lamp between the supply voltage circuit of the fog lamp relay coil at the fog lamp switch connector and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4

Connect a test lamp between the fog lamp relay connector terminal F9 and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

5

Connect a test lamp between the supply voltage circuit of the fog lamp switch at the fog lamp switch connector and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 15

Go to Step 14

6

Repair a poor connection or an open in the supply voltage circuit of the fog lamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

7

Connect a test lamp between the fog lamp relay terminals E11 and E9. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 9

8

Connect a test lamp between the fog lamp relay connector terminals F11 and E9. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 10

Go to Step 11

9

Connect a test lamp between the fog lamp relay connector terminal E11 and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 12

Go to Step 13

10

Replace the fog lamp relay. Refer to Fog Lamp Relay Replacement .

Did you complete the replacement?

--

Go to Step 16

--

11

Repair a poor connection or an open in the supply voltage circuit of the fog lamp relay coil. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

12

Repair a poor connection or an open in the supply voltage circuit of the high beam headlamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

13

Repair a poor connection or an open in the supply voltage circuit of the fog lamp relay switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

14

Repair a poor connection or an open in the supply voltage circuit of the fog lamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

15

Replace the fog lamp switch. Refer to Fog Lamp Switch Replacement .

Did you complete the replacement?

--

Go to Step 16

--

16

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3

Fog Lamps Inoperative - All Front Lamps - Europe

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the headlamps on.
  2. Turn the front fog lamp switch on.

Do the front fog lamps illuminate?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Leave the headlamps on.
  2. Leave the front foglamps on.
  3. Connect a test lamp between the front fog lamp switch connector terminal F and ground. Refer to Circuit Testing in Wiring Systems.

Did the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4

Connect a test lamp between the fog lamp relay connector terminals F11 and E9. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 10

5

Connect a test lamp between the front fog lamp switch connector terminal E and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

6

Replace the front fog lamp switch. Refer to Fog Lamp Switch Replacement .

Did you complete the replacement?

--

Go to Step 16

--

7

Repair a poor connection or an open in the supply voltage circuit of the fog lamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

8

Connect a test lamp between the fog lamp relay connector terminals E11 and E9. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 14

9

Connect a test lamp between the fog lamp relay terminals E9 and F9. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 11

Go to Step 15

10

Connect a test lamp between the fog lamp relay terminal F11 and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 13

Go to Step 12

11

Repair a poor connection or an open in the supply voltage circuit of the front fog lamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

12

Repair a poor connection or an open in the supply voltage circuit of the fog lamp relay coil. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

13

Repair a poor connection or an open in the ground circuit of the front fog lamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

14

Repair a poor connection or an open in the supply voltage circuit of the fog lamp relay switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

15

Replace the fog lamp relay. Refer to Fog Lamp Relay Replacement .

Did you complete the replacement?

--

Go to Step 16

--

16

Operate the system in order to verify the system.

Did you correct the condition?

--

System OK

Go to Step 3

Fog Lamps Inoperative - All Rear Lamps - Europe

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the headlamps on.
  2. Turn the front fog lamp switch on.
  3. Turn the rear fog lamp switch on.

Do the rear fog lamps illuminate?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Leave the headlamps on.
  2. Leave the front foglamps on.
  3. Leave the rear foglamps on.
  4. Connect a test lamp between the rear fog lamp switch connector terminal E and battery voltage. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4

Connect a test lamp between the BCM connector C3 terminal D9 and battery voltage. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 9

5

Connect a test lamp between the rear fog lamp switch connector terminal F and battery voltage. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

6

Replace the rear fog lamp switch. Refer to Rear Fog Lamp Switch Replacement .

Did you complete the replacement?

--

Go to Step 22

--

7

Repair a poor connection or an open in the ground circuit of the rear fog lamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 22

--

8

Connect a test lamp between the BCM connector C3 terminal C8 and battery voltage. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 10

Go to Step 11

9

Repair a poor connection or an open in the signal circuit of the rear fog lamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 22

--

10

Connect a test lamp between the fog lamp relay cavity A1 and battery voltage. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 12

Go to Step 13

11

Important: Perform the set up procedure for the body control module (BCM).

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

--

Go to Step 22

--

12

Connect a test lamp between the rear fog lamp relay cavities C2 and A1. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 14

Go to Step 15

13

Repair a poor connection or an open in the control circuit of the rear fog lamp relay. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 22

--

14

Connect a test lamp between the rear fog lamp relay cavities A1 and C1. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 16

Go to Step 17

15

Repair a poor connection or an open in the supply voltage circuit of the rear fog lamp relay. Refer to Wiring Repairs or Connector Repairs in Wiring System

Did you complete the repair?

--

Go to Step 22

--

16

Connect a test lamp between the rear fog lamp relay cavities A1 and A2. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 18

Go to Step 19

17

Repair a poor connection or an open in the supply voltage circuit of the rear fog lamp relay switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 22

--

18

Connect a test lamp between one of the rear fog lamps connector terminal A and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 20

Go to Step 21

19

Replace the rear fog lamp relay. Refer to Fog Lamp Relay Replacement .

Did you complete the replacement?

--

Go to Step 22

--

20

Repair a poor connection or an open in the ground circuit of the rear fog lamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 22

--

21

Repair a poor connection or an open in the supply voltage circuit of the rear fog lamps. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 22

--

22

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3