GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Inspect Fuse H9 - H10.

Is the fuse open?

Go to Step 2

Go to Step 3

2

Repair a short to ground in circuit 32.

Has the repair been made?

Refer to Interior Lights Dimming System Check

3

  1. Turn the headlamp switch to the PARK position.
  2. Using a test light, backprobe between the fuse block terminal H9 and ground.

Does the test light illuminate?

Go to Step 5

Go to Step 4

4

Repair a poor connection or an open in circuit 301 between S267 and the fuse block terminal H9.

Has the repair been made?

Go to Interior Lights Dimming System Check

5

Repair a poor connection or an open in circuit 32 between the fuse block terminal H10 and S241.

Has the repair been made?

Go to Interior Lights Dimming System Check