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
.
With RPO UM8 (Navigation)
- Speaker output shorted-Test all speaker outputs for a short. Refer to Circuit Testing and Wiring Repairs .
- Defective radio-Replace the radio. Refer to Control Module References .
Without RPO UM8
- 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 .
- 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 percent. If no AC voltage is present, replace the radio. Refer to Control Module References .
- No audio output from the amplifier-Replace the amplifier. Refer to Control Module References .
IMPORTANT:
The following procedure assumes all speakers are operative for all modes of operation except digital radio.
With RPO U2K
- Remote radio audio signal circuit shorted-Test the remote radio audio signal circuits for a short. Refer to Circuit Testing and Wiring Repairs .
- No audio output from the digital radio receiver-Replace the digital radio receiver. Refer to Control Module References .
- No digital radio audio output from the radio-Replace the radio. Refer to Control Module References .