GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlights System Check?

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Go to Step 2

Go to Headlight System Check

2

Use a test lampJ 35616-200 in order to backprobe CKT 42 (RED) cavity C at the headlamp and panel dimmer switch to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

  1. Turn the headlamp and panel dimmer switch to the ON position.
  2. Backprobe the headlamp and panel dimmer switch connector with a test lampJ 35616-200 from CKT 10 (YEL) cavity G to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 42 (RED) between the underhood fuse-relay center and the headlamp and panel dimmer switch.

Is the repair complete?

--

Go to Headlight System Check

--

5

  1. Disconnect the headlamp dimmer switch.
  2. Connect a test lampJ 35616-200 from the headlamp dimmer switch connector CKT 10 (YEL) cavity D to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

6

Replace the headlamp and panel dimmer switch Headlamp Switch Replacement .

Is the replacement complete?

--

Go to Headlight System Check

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7

Replace the headlamp dimmer switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Headlight System Check

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8

Repair the open in CKT 10 (YEL) between the headlamp, the panel dimmer switch and the headlamp dimmer switch.

Is the repair complete?

--

Go to Headlight System Check

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