GM Service Manual Online
For 1990-2009 cars only

Fog Lamps Always On Domestic

Step

Action

Value(s)

Yes

No

1

Was the entire Fog Lights System Check performed?

--

Go to Step 2

Go to Fog Lights System Check

2

  1. Turn the fog lamp switch off.
  2. Disconnect the foglamp relay located in the underhood electrical center.

Do the fog lamps turn off?

--

Go to Step 3

Go to Step 4

3

With a test light to ground, probe the foglamp relay cavity F11 in the underhood electrical center.

Does the test light illuminate?

--

Go to Step 5

Go to Step 6

4

Repair the short to B+ in circuit 34 between the fog lamps and the foglamp relay.

Is the repair complete?

--

Go to Step 9

--

5

  1. Disconnect the connector from the fog lamp switch.
  2. With a test light to ground, probe the fog lamp relay cavity F11 in the underhood electrical center.

Does the test light illuminate?

--

Go to Step 7

Go to Step 8

6

Replace the foglamp relay. Refer to Fog Lamp Relay Replacement

Is the repair complete?

--

Go to Step 9

--

7

Repair the short to B+ in circuit 317 between the fog lamp switch and the fog lamp relay.

Is the repair complete?

--

Go to Step 9

--

8

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

Is the repair complete?

--

Go to Step 9

--

9

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

--

Go to Fog Lights System Check

--

Fog Lamps Always On Europe

Step

Action

Value(s)

Yes

No

1

Was the entire Fog Lights System Check performed?

--

Go to Step 2

Go to Fog Lights System Check

2

Repair the short to B+ in circuit 122.

Is the repair complete?

--

Go to Step 3

--

3

  1. Turn the ignition switch to the OFF position.
  2. Reconnect all connectors/components removed.

Have all the repairs been made?

--

Go to Fog Lights System Check

--