GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlights System Check?

--

Go to Step 2

Go to Headlight System Check

2

  1. Disconnect the instrument cluster.
  2. Place the headlamp and panel dimmer switch in the ON position.
  3. Move the headlamp dimmer switch to the HI position.
  4. Connect a DMMJ 39200 from the instrument cluster connector CKT 750 (BLK) cavity B1 to ground.

Is there continuity?

--

Go to Step 3

Go to Step 4

3

Connect a test lampJ 35616-200 from the instrument cluster CKT 11 (LT GRN) cavity B3 to CKT 750 (BLK) cavity B1.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Inspect the bulb.

Is the bulb open?

--

Go to Step 10

--

5

Replace the instrument cluster. Refer to Instrument Cluster Replacement in Instrument Panel, Gauges and Console.

Is the replacement complete?

--

Go to Headlight System Check

--

6

Use a test lampJ 35616-200 in order to backprobe from the headlamp dimmer switch CKT 11 (LT GRN) cavity C to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

7

Repair the open in CKT11 (LT GRN) between the instrument cluster and S135.

Is the repair complete?

--

Go to Headlight System Check

--

8

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

Is the repair complete?

--

Go to Headlight System Check

--

9

Repair the open in CKT 750 (BLK) between the instrument cluster and splice S206.

Is the repair complete?

--

Go to Step 10

Go to Step 9

10

Replace the bulb.

Is the repair complete?

--

Go to Headlight System Check

--