Step | Action | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference: Backup Lamp Schematics | |||||||||||||||
1 | Did you perform the Lighting Diagnostic System Check? | Go to Step 2 | |||||||||||||
2 | Operate the backup lamps to verify the fault is present. Does the system operate normally? | Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 | ||||||||||||
3 | Is only one backup lamp inoperative? | Go to Step 4 | Go to Step 6 | ||||||||||||
4 | Test the backup lamp supply voltage circuit of the inoperative bulb for high resistance, an open, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 5 | ||||||||||||
5 | Test the ground circuit of the inoperative bulb for high resistance, an open, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 8 | ||||||||||||
6 | Test the ignition 1 voltage circuit of the backup lamp switch or park/neutral position switch for high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 7 | ||||||||||||
7 | Test the backup lamp supply voltage circuit of the backup lamp switch or park/neutral position switch for high resistance, an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 12 | Go to Step 9 | ||||||||||||
8 | Inspect for poor connections at the harness connector of the inoperative bulb. 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 12 | Go to Step 10 | ||||||||||||
9 | Inspect for poor connections at the harness connector of the backup lamp switch or park/neutral position switch. 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 12 | Go to Step 11 | ||||||||||||
10 | Replace the bulb. Refer to Tail/Turn Signal Lamp Replacement . Did you complete the replacement? | Go to Step 12 | -- | ||||||||||||
11 | Replace the backup lamp switch or park/neutral position switch. Refer to the following:
Did you complete the replacement? | Go to Step 12 | -- | ||||||||||||
12 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 | ||||||||||||
