Schematic Reference: Exterior Lights Schematics

Connector End View Reference: Lighting Systems Connector End Views , Computer/Integrating Systems Connector End Views in Computer/Integrating Systems, or Manual Transmission Connector End Views in Manual Transmission - Tremec 6-Speed

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Verify that the backup lamps are always on.

Do the backup lamps operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

Does this vehicle have a manual transmission?

Go to Step 5

Go to Step 4

Use the scan tool to check if there are any codes set in the current or history Powertrain DTC Information.

Are any codes present?

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Go to Step 6

1. Block the wheels or set the parking brake.
2. Turn the ignition switch to the RUN position with the engine OFF.
3. Disconnect the backup lamp switch.

Do the backup lamps remain illuminated?

Go to Step 6

Go to Step 9

Test the following circuits for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems:

Did you find and correct the condition?

Go to Step 10

Go to Step 7

Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 10

Go to Step 8

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 10

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Adjust or replace the backup lamp switch. Refer to Backup Lamp Switch Replacement in Manual Transmission - Tremec 6-Speed

Did you complete the repair?

Go to Step 10

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3