1. Disconnect the radio connector C1.
2. Turn the ignition switch to the run position.
3. Connect a test lamp from radio connector C1 terminal 7 to ground.
4. Turn the park lamps on.

Does the test lamp light?

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Go to Step 3

Go to Step 2

Repair the open in circuit 8 between the radio and S224.

Is the repair complete?

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System OK

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1. Test for a poor connection at the radio connector C1 terminal 7.
2. If the connection is OK, replace the radio. Refer to Radio Replacement .

Is the repair complete?

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System OK

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