Speakers Inoperative - All

SPEAKERS INOPERATIVE - ALL

DIAGNOSTIC SYSTEM CHECK - VEHICLE
Always perform the Diagnostic System Check - Vehicle before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle. Testing and Inspection

ALL SPEAKERS INOPERATIVE

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. Component Tests and General Diagnostics

Without RPO U26
1. Speaker output shorted-Test all speaker outputs for a short.
2. Defective radio-Replace the radio.

With RPO U85
1. Battery positive voltage circuit to the amplifier open-Test the battery positive voltage circuit to the amplifier for an open.
2. Low level audio signal circuit shorted-Test all low level audio signal circuits for a short to ground or short to voltage.
3. Amplifier mute circuit open or shorted to ground-Test the Amplifier mute circuit for an open or short to ground.
4. No low level audio output from the radio-Test for any A/C voltage between the left front low level audio signal circuits at the amplifier harness connector, disconnected with the radio volume adjusted to 50 percent. If no A/C voltage is present, replace the radio.
5. No audio output from the amplifier-Replace the amplifier.