Did you perform the Interior Lamps Diagnostic System Check?

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Go to Step 2

Go to Interior Lamps System Check

1. Disconnect the panel dimmer switch connector.
2. Turn the headlamp switch to the PARK position.
3. Measure the voltage between terminal C and terminal D of the dimmer switch connector.

Is the voltage equal to the specified value?

B+

Go to Step 3

Go to Step 4

1. Turn the headlamp switch to PARK.
2. Connect a fused jumper between terminal B of the panel dimmer switch connector and ground.

Do the interior lamps turn off?

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Go to Step 6

Go to Step 5

Repair an open in CKT 150. Refer to Wiring Repairs in Wiring

Is the repair complete?

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Go to Interior Lamps System Check

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Replace the lamp dimmer module.

Is the repair complete?

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Go to Interior Lamps System Check

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Replace the panel dimmer switch.

Is the repair complete?

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Go to Interior Lamps System Check

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