GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

1

  1. Turn the headlamp to the HEAD position.
  2. Turn the headlamp dimmer switch to the LOW position.
  3. Using a test lamp, probe between C201 terminal E6 to ground.

Does the test lamp illuminate?

Go to Step 3

Go to Step 2

2

Replace the headlamp dimmer switch. Refer to Multifunction Turn Signal Lever Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Has the repair been made?

Go to Headlight System Check

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3

Repair the poor connection or an open in circuit 12 between C201 terminal E6 and S104.

Has the repair been made?

Go to Headlight System Check

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