GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Entertainment 🢒 Radio Illumination Inoperative with Park Lamps On

Radio Illumination Inoperative with Park Lamps On Luxury

Step

Action

Value(s)

Yes

No

1

Has the radio/audio system check been performed?

Go to Step 2

Go to Radio/Audio System Check

2
  1. Remove the rear stereo controller.
  2. Disconnect the rear stereo controller connector.
  3. Place the headlamp and panel dimmer switch in the park position.
  4. Connect a J 39200 between connector C1 Pin 6 and ground.

Is there battery voltage?

Go to Step 3

Go to Step 4

3

Remove the rear stereo controller and send for service.

Is the repair complete?

Go to Radio/Audio System Check

4
  1. Remove the headlamp and panel dimmer switch.
  2. Disconnect the headlamp and panel dimmer switch connector.
  3. Connect a J 39200

Is there battery voltage?

Go to Step 6

Go to Step 5

5

Locate and repair the open in CKT 240 (ORN) between the IP fuse block and the headlamp and panel dimmer switch. Refer to Wiring Repairs

Is the repair complete?

Go to Radio/Audio System Check

6

Connect a J 39200

Is there continuity?

Go to Step 8

Go to Step 7

7

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

Is the repair complete?

Go to Radio/Audio System Check

8

Locate and repair the open in CKT 9 (BRN) between the rear stereo controller and the headlamp and panel dimmer switch. Refer to Wiring Repairs

Is the repair complete?

Go to Radio/Audio System Check