GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Result(s)

Abnormal Result(s)*

1

  1. Turn the ignition switch to ON.
  2. Place the headlamp switch in PARK.

All of the park lamps illuminate.

2

  1. Place the headlamp switch in OFF.
  2. Press the hazard button in order to activate the hazard flashers.

All of the turn signal lamps flash.

Hazard Lamps Inoperative

3

  1. Press the hazard button in order to turn the hazard flashers off.
  2. Press the brake pedal.

All of the stoplamps illuminate while the brake pedal is pressed.

Stop Lamps Inoperative - Center High Mounted

4

  1. Turn the ignition switch to ON.
  2. Place the turn signal switch in the left turn position.
  3. Place the turn signal switch in the right turn position.
    • The respective front turn signal lamps flash 80-90 times per minute.
    • The respective rear turn signal lamps flash 80-90 times per minute.

Turn Signal Lamps Inoperative - Hazard Lamps Operate

5

  1. Turn the ignition switch to ON.
  2. Place the headlamp switch in the HEAD position.
  3. Place the fog lamp switch in the ON position.

The fog lamps illuminate.

Fog Lamps Inoperative - All

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