Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System | |||
1 | Did you perform the Lighting Systems Diagnostic System Check? | 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 in Wiring Systems | 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 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 in Wiring Systems. 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 in Wiring Systems. 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 in Wiring Systems. 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 in Wiring Systems. 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 Body Control Module (BCM). Refer to Circuit Testing and Wiring Repairs in Wiring Systems. 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 in Wiring Systems. 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 in Wiring Systems. 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 Backup Lamp Switch Replacement in Manual Transmission - NV 3500, Backup Lamp Switch Replacement in Manual Transmission - NV 4500 or Backup Lamp Switch Replacement in Manual Transmission - ZF S6-650. Did you complete the replacement? | Go to Step 19 | -- |
18 |
Important: Perform the setup procedure for the BCM. Replace the body control module (BCM). Refer to Body Control Module Replacement in Body Control System. 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 |
