Was the entire Radio/Audio System System Check performed?

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Go to Step 2

Go to Radio/Audio System Check

1. Connect a test light.
2. Backprobe between the radio harness connector C1 terminal 10 and ground.

Does the test light illuminate?

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Go to Step 3

Go to Step 4

Service the radio. Refer to Radio Replacement

Is the repair complete?

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Go to Step 5

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Repair a poor connection or open in circuit 640.

Is the repair complete?

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Go to Step 5

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1. Turn the ignition switch to the OFF position.
2. Reconnect all connectors/components removed.

Have all the repairs been made?

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Go to Radio/Audio System Check

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