C 3500 HD Truck 2WD V8-8.1L VIN G (2002)
SCHEMATIC REFERENCE: Radio/Audio System Schematics.
PRELIMINARY INFORMATION
Review the Radio/Audio Description and Operation and perform necessary inspections. Refer to Radio/Audio System Description and Operation.
IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of
a component, always inspect for a poor connection before proceeding with replacement. Refer to Testing for Intermittent and Poor Connections, and to
Connector Repairs in Diagnostic Aids.
ONE SPEAKER INOPERATIVE
1. Speaker output open. Test the appropriate speaker output circuits for an open. Refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids.
2. Audio output from the radio is not evident. Test for any AC voltage between the appropriate speaker output circuits at the speaker harness
connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. Refer to Speaker
Replacement Reference. If AC voltage is not present, replace the radio. Refer to Radio Replacement.
ALL SPEAKERS INOPERATIVE
1. Speaker output shorted - Test all speaker outputs for a short. Refer to Circuit Testing, and to Wiring Repairs in Diagnostic Aids.
2. Faulty radio - Replace the radio. Refer to Radio Replacement.
Speaker Replacement Reference
SPEAKER REPLACEMENT REFERENCE