GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to the ON position.
  2. Turn the headlamp switch to the PARK position.
  3. Turn the fog lamps ON.
  1. Both of the fog lamps illuminate.
  2. The fog lamp indicator illuminates.
  1. Both of the fog lamps are inoperative. Refer to Fog Lamps Inoperative - All for diagnosis.
  2. The fog lamp indicator is inoperative. Refer to Fog Lamp Indicator Inoperative for diagnosis.

2

  1. Turn the ignition switch to the ON position.
  2. Turn the headlamp switch to the PARK position.
  3. Turn the fog lamps ON.
  1. Both of the fog lamps illuminate.
  2. The fog lamp indicator illuminates.
  1. Only the LH fog lamp illuminates. Refer to Fog Lamps Inoperative - All for diagnosis.
  2. Only the RH fog lamp illuminates. Refer to Fog Lamps Inoperative - All for diagnosis.

* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.