GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Exterior Lights Schematics

1

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn OFF the ignition.
  2. Remove the REVERSE relay.
  3. Turn ON the ignition with the engine OFF.

Do the Backup Lamps remain illuminated?

Go to Step 5

Go to Step 3

3

Connect a test lamp between the REVERSE relay control circuit and the battery positive voltage circuit of the REVERSE relay coil.

Does the test lamp illuminate?

Go to Step 4

Go to Step 6

4

Test for a short to ground in the control circuit of the REVERSE relay. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 7

5

Repair the short to voltage in the supplied positive voltage circuit of the Backup Lamps. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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6

Replace the REVERSE relay. Refer to Relay Replacement in Wiring Systems.

Did you complete the replacement?

Go to Step 8

--

7

Replace the RIM. Refer to Rear Integration Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 8

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8

Operate the system in order to verify the repair.

Did you find and correct the condition?

System OK

Go to Step 2