Audio Distortion - One or More Speakers

Audio Distortion - One or More Speakers

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Testing

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.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Speaker Replacement Reference