Schematic Reference: Radio/Audio System Schematics

Perform the Diagnostic System Check - Radio/Audio System .

Important: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement. Refer to Testing for Intermittent Conditions and Poor Connections , and Connector Repairs in Wiring Systems.

1. Speaker output open. Test the appropriate speaker output circuits for an open. Refer to Circuit Testing , and Wiring Repairs in Wiring Systems.
2. Audio output from the radio is not evident. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. For speaker testing location Refer to Speaker Replacement Reference . If AC voltage is not present, replace the radio. Refer to Radio Replacement .

Important: The radio must be programmed after replacement. Refer to Service Programming System (SPS) in Programming.

1. Speaker output shorted -- Test all speaker outputs for a short. Refer to Circuit Testing , and Wiring Repairs in Wiring Systems.
2. Antenna Enable Signal/Amplifier Control signal open -- Refer to Circuit Testing , and Wiring Repairs in Wiring Systems.
3. Faulty radio -- Replace the radio. Refer to Radio Replacement .

Important: The radio must be programmed after replacement. Refer to Service Programming System (SPS) in Programming.