Step | Action | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Lighting Systems Connector End Views or Computer/Integrating Systems Connector End Views in Computer/Integrating Systems | |||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information | ||||||
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 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 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 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 the following:
Did you complete the replacement? | Go to Step 19 | -- | ||||||
18 | 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 19 | -- | ||||||
19 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||||
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics and Interior Lights Schematics | |||
1 | Did you review Blackout (B/O) Lighting Description and Operation? | Go to Step 2 | |
2 | Is only one backup lamp inoperative? | Go to Step 3 | Go to Step 4 |
3 | Test the backup lamp supply voltage circuit of the inoperative bulb for high resistance, an open, or a short to ground. Did you find and correct the condition? | Go to Step 17 | Go to Step 5 |
4 |
| Go to Step 17 | Go to Step 6 |
5 | Test the ground circuit of the inoperative bulb for high resistance or an open. Did you find and correct the condition? | Go to Step 17 | Go to Step 13 |
6 | Connect a test lamp between connector C1 cavity C of the junction block rear lamps and ground. Does the test lamp illuminate? | Go to Step 7 | Go to Step 9 |
7 | Connect a test lamp between connector C1 cavity E and ground. Does the test lamp illuminate? | Go to Step 8 | Go to Step 13 |
8 | Locate and repair the open or high resistance in the ground circuit. Did you complete the repair? | Go to Step 17 | ___ |
9 | Connect a test lamp between cavity 30 of the interrupt relay and ground. Does the test lamp illuminate? | Go to Step 10 | Go to Step 11 |
10 | Locate and repair the open in circuit 24. Did you complete the repair? | Go to Step 17 | ___ |
11 | Connect a test lamp between cavity 87 of the interrupt relay and ground. Does the test lamp illuminate? | Go to Step 14 | Go to Step 12 |
12 | Connect a test lamp between cavity F of the backup lamp switch and ground. Does the test lamp illuminate? | Go to Step 15 | Go to Step 16 |
13 | Replace the bulbs. Did you complete the replacement? | Go to Step 17 | ___ |
14 | Replace the interrupt relay. Did you complete the replacement? | Go to Step 17 | ___ |
15 | Locate and repair the open or high resistance in circuit 1524 or 24. Did you complete the repair? | Go to Step 17 | ___ |
16 | Replace the backup lamp switch. Did you complete the replacement? | Go to Step 17 | ___ |
17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
