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)
- 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
- 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.
- 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.