Step | Action | Yes | No | ||||
|---|---|---|---|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Data Communication Connector End Views | |||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||
2 | Verify that the backup lamps are inoperative. Do the backup lamps operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 | ||||
3 | Is only one backup lamp inoperative? | Go to Step 10 | Go to Step 4 | ||||
4 | Is the vehicle equipped with a manual transmission? | Go to Step 5 | Go to Step 9 | ||||
5 |
Do the backup lamps illuminate? | Go to Step 12 | Go to Step 6 | ||||
6 | Connect a test lamp between the ignition 1 voltage circuit of the backup lamp switch connector and a good ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 8 | ||||
7 | Connect a test lamp between the backup lamp signal circuit of the body control module (BCM) and a good ground. Does the test lamp illuminate? | Go to Step 11 | Go to Step 15 | ||||
8 | Test the backup lamp signal circuit and the courtesy lamp supply voltage circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 14 | ||||
9 | 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 the Diagnostic System Check in the appropriate Transmission Section | Go to Step 11 | ||||
10 | Test the backup lamp supply voltage and ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 19 | Go to Step 16 | ||||
11 | Test the backup lamp supply voltage circuit for an open or high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct a condition? | Go to Step 19 | Go to Step 13 | ||||
12 | Inspect for poor connections at the harness connector of the backup lamp switch. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 17 | ||||
13 | Inspect for poor connections at the harness connector of the BCM. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 19 | Go to Step 18 | ||||
14 | Repair the ignition 1 voltage circuit of the backup lamp switch for a high resistance, an open or a short to ground. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 19 | -- | ||||
15 | Repair the backup lamp signal circuit of the backup lamp switch for a high resistance or an open. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 19 | -- | ||||
16 | Replace the affected backup lamp bulb. Did you complete the replacement? | Go to Step 19 | -- | ||||
17 | Replace backup lamp switch. Refer to the following:
Did you complete the replacement? | Go to Step 19 | -- | ||||
18 | Replace the BCM. Refer to Control Module References . Did you complete the replacement? | Go to Step 19 | -- | ||||
19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||
