GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 G6 🢒 Accessories 🢒 Entertainment 🢒 Speakers Inoperative - All

Schematic Reference: Radio/Audio System Schematics

Connector End Views Reference: Entertainment Connector End Views

Diagnostic System Check - Vehicle

Always perform the Diagnostic System Check - Vehicle before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle .

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 .

Without RPO U26

    • Speaker output shorted--Test all speaker outputs for a short. Refer to Circuit Testing and Wiring Repairs .
    • Defective radio--Replace the radio. Refer to Radio Replacement .

In the Monsoon radio system (U85) the front door tweeters and rear midrange speakers are coupled together inside the amplifier on the same bridge. Similarly, the front door lower speakers and the rear subwoofers are coupled together within the amplifier. Therefore it is possible to have a concern with one of the channels, wires, or speakers that affect the operation of one or all of the channels that use the same bridge. For example, a concern that causes distortion in a dominate midrange speaker may be caused by a problem with the coupled speaker on that circuit.

With RPO U85

    • 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 .
    • 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 .
    • Amplifier mute circuit open or shorted to ground--Test the Amplifier mute circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs .
    • 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. Refer to Radio Replacement .
    • No audio output from the amplifier--Replace the amplifier. Refer to Radio Speaker Amplifier Replacement .