Speakers - Reduced Volume

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 Connector Repairs in Diagnostic Aids.

Without RPO U80
1. Speaker output circuit high resistance. Test the appropriate speaker output circuits for high resistance. Refer to Circuit Testing and Wiring Repairs in Diagnostic Aids.
2. Defective speaker - Replace the appropriate speaker. Refer to Speaker Replacement Reference. Initial Inspection and Diagnostic Overview

With RPO U80 (Bose)
1. Speaker output circuit high resistance. Test the appropriate speaker output circuits for high resistance. Refer to Circuit Testing and Wiring Repairs in Diagnostic Aids.
2. Low level audio circuit open. Test the appropriate low level audio circuit for an open. Refer to Circuit Testing and Wiring Repairs in Diagnostic Aids.
3. Defective speaker - Replace the appropriate speaker. Refer to Speaker Replacement Reference. Initial Inspection and Diagnostic Overview

"For a description of the RPO Code(s) shown in this article or any of the images therein, refer to the RPO Code List found at Vehicle/Application". RPO Codes