1. Disconnect the connector at the automatic day-night rear view mirror.
2. With the ignition in the RUN position, place the transmission in reverse.
3. Connect a test lamp from the automatic day-night rear view mirror connector cavity 3 to ground.

Does the test lamp light?

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Go to Step 3

Go to Step 2

Inspect the backup lights.

Do the backup lights function properly?

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Go to Step 4

Go to Backup Lamps Inoperative in Lighting Systems

Replace the automatic day-night rear view mirror. Refer to Inside Rearview Mirror Replacement .

Is the repair complete?

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System OK

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Locate and repair the open in CKT 1324 (LT GRN) between the mirror and the fuse.

Is the repair complete?

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System OK

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