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

Headlight System Check Domestic

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the headlamp switch to the HEAD position.
  2. Position the headlamp dimmer switch to the LOW beam position.
    • The low beam headlamps are on.
    • The high beam headlamps are off.

2

Position the headlamp dimmer switch to the HIGH beam position.
    • The high beam headlamps are on.
    • The high beam indicator is on.
    • The low beam headlamps are off.

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

Headlight System Check Export

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the headlamp switch to the HEAD position.
  2. Position the headlamp dimmer switch to the LOW beam position.
    • The low beam headlamps are on.
    • The high beam headlamps are off.

2

Position the headlamp dimmer switch to the HIGH beam position.
    • The high beam headlamps are on.
    • The high beam indicator is on.
    • The low beam headlamps are off.

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