Schematic Reference: Radio/Audio System Schematics

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

1. Test the battery and ground supply circuits to the amplifier. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
2. Test the sensitivity and mute circuits for an open or short to ground condition. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
3. No audio output from the radio. Replace the radio. Refer to Radio Replacement .
4. No audio output from the amplifier. Test for any AC voltage between one speaker output circuit at the amplifier with the appropriate speaker disconnected and the radio volume adjusted to an audible level. If no AC voltage is present at the amplifier, replace the amplifier.

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

1. No voltage or ground present at remote CD player. Test the battery and ground supply circuits to the remote CD player. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
2. No control circuit present at the remote CD player. Test the remote CD player control circuit between the radio and the remote CD player for an open or short to ground condition. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
3. No audio output from the remote CD player. Replace the remote CD player.

Audio input present at the radio from the remote CD player. Replace the radio. Refer to Radio Replacement

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

1. No channel output from the remote CD player. Replace the remote CD player.
2. No channel input at the radio. Test the channel circuit between the remote CD player and the radio for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
3. Channel input present at the radio. Replace the radio. Refer to Radio Replacement .

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 or shorted. Test the appropriate speaker output circuits for an open or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
2. Defective speaker. Replace the inoperative speaker. Refer to Speaker Replacement Reference .

No output from the radio. Replace the radio. Refer to Radio Replacement .

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 or shorted. Test the appropriate speaker output circuits for an open or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
2. Defective speaker. Replace the inoperative speaker. Refer to Speaker Replacement Reference .
3. Audio output from the radio to the remote amplifier open or shorted. Test the appropriate radio output circuits for an open or short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
4. No audio output from the amplifier. Test for any AC voltage between the speaker output circuit at the amplifier with the appropriate speaker disconnected and the radio volume adjusted to an audible level. If no AC voltage is present at the amplifier, replace the amplifier.
5. No audio output from the radio. Replace the radio. Refer to Radio Replacement .

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 circuit high resistance. Test the appropriate speaker output circuits for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
2. Low level audio circuit open. Test the appropriate low level audio circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
3. Defective speaker - Replace the appropriate speaker. Refer to Speaker Replacement Reference .