All Speakers Inoperative

1. Low level audio output of the radio shorted-Test all radio low level audio outputs for a short. Refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids.
2. Remote radio control supply voltage circuit is open or shorted-Test the remote radio control supply voltage circuit of the radio for an open or a short. Refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids.
3. Rear seat audio enable signal circuit is shorted-Test the rear seat audio enable signal circuit of the radio for a short. Refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids.
4. Radio on signal circuit is open or shorted-Test the radio on signal circuit of the radio for an open or a short. Refer to Circuit Testing, and to Wiring Repairs6 in Diagnostic Aids.
5. Amplifier control circuit is open or shorted-Test the amplifier control circuit of the switch amplifier power relay for an open or a short. Refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids.
If the amplifier control circuit test result is acceptable, test the following circuits for an open, and refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids:
^ Accessory voltage circuit of the switch amplifier power relay.
^ Ground circuit of the switch amplifier power relay
^ Amplifier supply voltage circuit of the Bose amplifiers
^ Battery positive voltage circuit of the Bose amplifiers
^ Ground circuit of the Bose amplifiers
If the ground circuit test result is acceptable, replace the switch amplifier power relay.