Schematic Reference: Exterior Lights Schematics

Did you perform the Lighting Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

1. Turn the ignition on.
2. Shift the gear selector lever to the REVERSE position.

Do the backup lamps turn on?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Disconnect the park/neutral position switch.
2. Connect a test lamp to a known good ground and probe the battery positive voltage circuit for the park/neutral position switch.

Does the test lamp turn on?

Go to Step 4

Go to Step 6

Install a fused jumper wire across the battery positive voltage circuit and the backup lamps supply voltage circuit of the park/neutral position switch.

Do the backup lamps turn ON?

Go to Step 7

Go to Step 5

Repair a short to ground, 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 complete the repair?

Go to Step 8

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Repair a high resistance or an open in the battery positive voltage circuit of the park/neutral position switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 8

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Adjust or replace the park/neutral position switch. Refer to Park/Neutral Position Switch Adjustment and Park/Neutral Position Switch Replacement in Automatic Transaxle-4T65-E.

Did you complete the adjustment/replacement?

Go to Step 8

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2