All Speakers Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
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.
Without RPO U87
- Speaker output shorted - Test all speaker outputs for a short. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
- Defective radio - Replace the radio. Refer to Radio Replacement .
With RPO U87
- Battery positive voltage circuit to the amplifier open. Test the battery positive voltage circuit to the amplifier for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
- Low level audio signal circuit shorted. Test all low level audio signal circuits for a short to ground or short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
- Radio On signal circuit open or shorted to ground. Test the Radio On Signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
- No low level audio output from the radio. Test for any AC voltage between the left front low level audio signal circuits at the amplifier harness connector, disconnected with the radio volume adjusted to 50%. If no AC voltage is present, replace the radio. Refer to Radio Replacement .
- No audio output from the amplifier. Replace the amplifier. Refer to Amplifier Replacement .