Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List in Wiring 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 |
Do the both backup lamps turn on? | 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 7 | Go to Step 4 |
4 |
Do the backup lamps illuminate when commanded by the body control module (BCM)? | Go to Step 11 | Go to Step 5 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 13 |
6 | Install a fused jumper across the switch side battery positive voltage supply circuit of the backup lamp relay and the backup lamp supply voltage circuit of the backup lamp relay. Do the backup lamps turn on? | Go to Step 12 | Go to Step 9 |
7 |
Does the test lamp illuminate? | Go to Step 8 | Go to Step 14 |
8 | Connect a test lamp between the ground circuit and supply voltage circuit of the inoperative backup lamp. Does the test lamp illuminate? | Go to Step 10 | Go to Step 15 |
9 | Test for a high resistance or an open in the backup lamps supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 16 |
10 | Inspect for poor connections at the harness connector of the inoperative backup lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 17 |
11 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 18 |
12 | Inspect for poor connections at the harness connector of the backup lamp relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 20 | Go to Step 19 |
13 | Repair a high resistance or an open in the switch side battery positive voltage supply circuit of the backup lamp relay . Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
14 | Repair a high resistance or an open in the backup lamp supply voltage circuit of the inoperative backup lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
15 | Repair a high resistance or an open in the backup lamp ground circuit of the inoperative backup lamp. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
16 | Repair a high resistance or an open in the backup lamps ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
17 | Replace the inoperative backup lamp. Refer to Tail Lamp Assembly and /or Backup, Sidemarker, Stop, Turn Signal Bulb Replacement . Did you complete the repair? | Go to Step 20 | -- |
18 | Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming. Did you complete the repair? | Go to Step 20 | -- |
19 | Replace the backup lamp relay. Refer to Relay Replacement in Wiring Systems. Did you complete the repair? | Go to Step 20 | -- |
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
