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Home >> GMC >> 2007 >> Acadia SLE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 287 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Audio Distortion - One or More Speakers >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

With GMLAN Amplifier (Bose)

  1. Turn ON the ignition, with the engine OFF and turn ON the radio. Adjust the fade and balance controls to mid range and Insert the CD from the J 39916-A CD Diagnostic Audio Kit to identify the suspect speaker.
    • Replace suspect speaker if distortion is found.

Without GMLAN Amplifier

  1. Turn ON the ignition, with the engine OFF and turn ON the radio. Adjust the fade and balance controls to mid range and Insert the CD from the J 39916-A CD Diagnostic Audio Kit to identify the suspect speaker.
  2. Test for a short to B+ or short to ground on the suspected speaker channel circuits between the amplifier and the suspect speaker.
    • If all circuits test normal, replace suspect speaker if distortion is found.
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