GM Service Manual Online
For 1990-2009 cars only

Step

Action

Normal Results

Abnormal Results*

1

Turn the light switch to the PARK position.

The following lamps are on:

    • All the park lamps
    • The rear side marker lamps
    • The tail lamps
    • The license plate lamps

2

  1. Turn the light switch to the OFF position.
  2. Press the hazard switch to the ON position.

The following components flash approximately 80-90 times per minute:

    • The front turn lamps
    • The rear turn lamps
    • The left turn indicators
    • The right turn indicators

3

  1. Press the hazard switch to the OFF position.
  2. Depress the brake pedal.

The stoplamps illuminate.

Stop Lamps Inoperative

4

Release the brake pedal.

The stoplamps turn off.

Stop Lamps Always On

5

  1. Turn the ignition switch to the ON position.
  2. Press the turn signal switch to the left turn position.

The following components flash approximately 80-90 times per minute:

    • The left front turn lamps
    • The left rear turn lamps
    • The left turn indicator

6

Press the turn signal switch to the right turn position.

The following components flash approximately 80-90 times per minute:

    • The right front turn lamps
    • The right rear turn lamps
    • The right turn indicator

7

Press the turn signal switch to the OFF position.

the turn signal lamps do not flash.

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