GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Backup Lights System Check?

--

Go to Step 2

Go to Backup Lamp System Check

2

Disconnect the remote function actuator (RFA) module connector.

Do the backup lamps turn off?

--

Go to Step 5

Go to Step 3

3

Remove the PERIM LP relay from the IP junction block.

Do the backup lamps turn off?

--

Go to Step 6

Go to Step 4

4

Repair the short to battery positive voltage (B+) in CKT 24 (LT GRN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Backup Lamp System Check

--

5

Replace the RFA module. Refer to Remote Control Door Lock Receiver Replacement in Keyless Entry.

Is the RFA module replacement complete?

--

Go to Backup Lamp System Check

--

6

Test for a short to ground in CKT 1655 (DK GRN). Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 1655?

--

Go to Step 7

Go to Step 8

7

Replace the PERIM LP relay in the IP junction block.

Is the relay replacement complete?

--

Go to Backup Lamp System Check

--

8

Repair the short to ground in CKT 1655 (DK GRN).

Is the repair complete?

--

Go to Backup Lamp System Check

--