GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Fog Lights System Check

Fog Lights Diagnostic System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the ignition switch to the ON position (engine OFF).
  2. Turn the headlamp switch to the ON position (headlamps ON).

Headlamps illuminate.

Low and High Beams Headlamps Inoperative

2
  1. Momentarily depress the front foglamp switch button.
  2. Momentarily depress the rear foglamp switch button (export).
    • Both front foglamps illuminate.
    • The front foglamp indicator illuminates.
    • Both rear foglamps illuminate (export).
    • The rear foglamp indicator illuminates (export).

3
  1. Momentarily depress the front foglamp switch button.
  2. Momentarily depress the rear foglamp switch button (export).
  3. Turn the headlamp switch to the OFF position.
  4. Turn the ignition switch to the OFF position.
    • Both front foglamps turn OFF.
    • Both rear foglamps turn OFF (export).
    •  Fog Lamps Always On

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