Important: A short to ground will cause an open fuse(s). Before performing this diagnostic procedure, inspect the fuse(s) for an open.

1. Disconnect the panel dimmer switch connector.
2. Turn the headlamp switch to the PARK position.
3. Connect a test lamp between terminal C and terminal D of the instrument panel dimmer switch connector.

Does the test lamp light?

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Go to Step 2

Go to Step 3

1. Disconnect the lamp dimmer module.
2. Measure the resistance in CKT 44 between the lamp dimmer module and the panel dimmer switch.

Is the measured resistance within the specified range?

0-2 ohms

Go to Step 4

Go to Step 5

Repair the open in CKT 151 between the panel dimmer switch and ground splice pack G202. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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1. Reconnect the lamp dimmer module.
2. Use a fused jumper in order to ground terminal B of the panel dimmer switch connector.

Do the IP lamps remain lit?

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Go to Step 6

Go to Step 7

Repair the open in CKT 44 between the lamp dimmer module and the panel dimmer switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Replace the lamp dimmer module.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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Replace the panel dimmer switch.

Is the repair complete?

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Go to Interior Lights Dimming System Check

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