GM Service Manual Online
For 1990-2009 cars only

Fog Lamp Switch Illumination Lamp Inoperative Euro, Pont, Chev Dom, Jap, Gulf State

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

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Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

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

Does the fog lamp switch illuminate?

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

Go to Step 3

3

Is the vehicle a Pontiac?

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Go to Step 4

Go to Step 5

4

  1. Leave the headlamps on.
  2. Leave the foglamps on.
  3. Leave the headlamp dimmer switch in the low beam position.

Are both the fog lamp switch illumination and the fog lamp on indicator inoperative?

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Go to Step 9

Go to Step 10

5

  1. Leave the headlamps on.
  2. Connect a test lamp between the fog lamp switch connector terminal B and terminal C. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

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Go to Step 6

Go to Step 7

6

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

Did you complete the replacement?

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Go to Step 13

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7

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

Does the test lamp illuminate?

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Go to Step 8

Go to Step 12

8

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

Did you complete the repair?

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Go to Step 13

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9

Connect a test lamp between the fog lamp switch connector terminal G and battery voltage. Wiring Systems.

Does the test lamp illuminate?

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Go to Step 6

Go to Step 11

10

Connect a test lamp between the fog lamp switch connector terminals F and G. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

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Go to Step 6

Go to Step 12

11

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

Did you complete the repair?

--

Go to Step 13

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12

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

Did you complete the repair?

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Go to Step 13

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13

Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Step 3