GM Service Manual Online
For 1990-2009 cars only

Courtesy or Dome Lamps Always On P32

Step

Action

Value(s)

Yes

No

1

  1. Disconnect connector C210.
  2. Connect a test light from cavity B of the headlamp/panel dimmer switch connector to ground.
  3. Turn the dome lamp override switch ON, (button depressed).

Does the test light illuminate?

--

Go to Step 2

Go to Step 5

2

  1. Disconnect the headlamp/panel dimmer switch.
  2. Connect a test light from cavity B of the headlamp/panel dimmer switch connector to ground.

Does the test light illuminate?

--

Go to Step 3

Go to Step 4

3

Locate and repair the short to B+ in CKT 157 (GRY) between C210 and the headlamp/panel dimmer switch.

Did you complete the repair?

--

System OK

--

4

Replace the headlamp/panel dimmer switch.

Did you complete the repair?

--

System OK

--

5

Connect a test light from C210 of the body builders wire harness connector, cavity A to ground.

Does the test light illuminate?

--

Go to Step 6

System OK

6

  1. Locate and repair the short to B+ in the body builder installed wire harness.
  2. Connect connector C210.

Did you complete the repair?

--

System OK

--

Courtesy or Dome Lamps Always On P42

Step

Action

Value(s)

Yes

No

1

Disconnect connector C207 (P42), or C210 (P32).

Does the dome lamp remain on?

--

Go to Step 2

Go to Step 3

2

Repair the short to ground or to B+ in the wiring beyond connector C207 (P42), or C210 (P32). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

System OK

--

3

  1. Disconnect the instrument panel (IP) lamps dimmer switch.
  2. Connect a test light from connector C207 cavity A (P42), or C210 cavity B (P32) to B+.

Did the test light illuminate?

--

Go to Step 4

Go to Step 5

4

Repair the short to ground in CKT 156 (WHT).

Did you complete the repair?

--

System OK

--

5

Replace the IP lamps dimmer switch.

Did you complete the repair?

--

System OK

--