GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 1998 🢒 Silhouette Ext. 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Headlight System Check

Step

Action

Normal Result(s)

Abnormal Result(s)*

1
  1. Turn the headlamp switch to the HEAD position on the headlamp/instrument panel (IP) lamp dimmer switch.
  2. Turn the headlamp dimmer switch to the LOW position.

Only the low beam headlamps are on.

Low and High Beams Headlamps Inoperative

Headlamps Inoperative - Low Beams

Headlamps Inoperative - One Lamp

2

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

Low and High Beams Headlamps Inoperative

Headlamps Inoperative - High Beams

High Beam Indicator Inoperative

Headlamps Inoperative - One Lamp

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