GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Backup Lights System Check?

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Go to Step 2

Go to Backup Lamp System Check

2

  1. Turn the ignition switch to the RUN position.
  2. Disconnect the backup lamp switch (or the transmission range switch) and the backup lamp switch.

Do the backup lamps light?

--

Go to Step 3

Go to Step 4

3

Locate and repair the short to B+ in one of the following locations:

    • CKT 1324 (LT GRN)
    • CKT 1524 (GRY)
    • The underhood fuse block

Is the repair complete?

--

Go to Backup Lamp System Check

--

4

Adjust the appropriate switch:

    • The backup lamp switch
    • The transmission range switch

Do the switches adjust and operate properly?

--

Go to Backup Lamp System Check

Go to Step 5

5

Replace the appropriate switch:

    • The backup lamp switch
    • The transmission range switch

Is the repair complete?

--

Go to Backup Lamp System Check

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