GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the entire Interior Lights Dimming System Check?

--

Go to Step 2

Go to Interior Lights Dimming System Check

2

Disconnect the headlamp switch connector C2.

Does all of the INC DIM 2 incandescent lighting turn off?

--

Go to Step 6

Go to Step 3

3

Disconnect the instrument cluster connector C3.

Does all of the INC DIM 2 incandescent lighting turn off?

--

Go to Step 7

Go to Step 4

4

Disconnect the instrument cluster connector C2.

Does all of the INC DIM 2 incandescent lighting turn off?

--

Go to Step 8

Go to Step 5

5

Repair the short to battery positive voltage (B+) in CKT 1244 (BRN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

6

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

7

Repair the short to ground in CKT 328 (PPL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--

8

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

Is the repair complete?

--

Go to Interior Lights Dimming System Check

--