Has the Radio/Audio System Check been performed?

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Go to Step 2

Go to Radio/Audio System Check

Does the radio display vary with the dimming control?

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Go to Step 3

Go to Step 4

Inspect the radio display buttons.

Does the radio display respond when you press the buttons?

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Go to Step 6

Go to Step 7

1. Remove the radio. Refer to Radio Replacement .
2. Turn the ignition to the RUN position.
3. Turn the radio to the ON position.
4. Use a J 39200 in order to backprobe from the radio connector C1, cavity 6 to ground.
5. Turn the Headlamp Switch to the PARK position.

Is battery voltage present?

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Go to Step 5

Go to Step 8

1. Place the ignition in the RUN position.
2. Turn the radio to the ON position.
3. Use a J 39200 in order to backprobe from the radio connector C1, cavity 7 to ground.
4. Turn the headlamp dimmer switch back and forth.

Is voltage within the specified range?

0-10 Volts

Go to Step 7

Go to Step 9

Refer to Intermittents and Poor Connections Diagnosis in Wiring Systems.

Is the repair complete?

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Go to Radio/Audio System Check

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Send the radio in for repair.

Is the repair complete?

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Go to Radio/Audio System Check

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Repair the open in CKT 1382 (PPL/WHT) between the radio connector C2 and the headlamp panel dimmer switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Radio/Audio System Check

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Repair the open in CKT 8 (GRY) between the radio connector C1 and the IP fuse block. Refer to Wiring Repairs .

Is the repair complete?

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Go to Radio/Audio System Check

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