Audio Distortion - One or More Speakers

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Step	Action	Value(s)	Yes	No
Schematic Reference: Radio/Audio System Schematics
1	Did you perform the Radio/Audio System Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - Radio/Audio System
2	Turn OFF the ignition. Can audio distortion be heard from the speakers?	-	Go to Step 7	Go to Step 3
3	Turn ON the ignition, with the engine OFF. Turn ON the radio. Adjust the fade and balance controls to mid range. Insert the tape or CD from the J 39916 -A . Can audio distortion be heard from the speakers?	-	Go to Step 4	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
4	Test the ground circuits of the Bose signal processor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 15	Go to Step 5
5	Test the audio drain wire circuits of the radio for high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 15	Go to Step 6
6	Test the front center speaker output circuits of the radio and the sub -woofer audio return circuits of the Bose signal processor for a short to voltage or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 15	Go to Step 10
7	Disconnect the Bose signal processor. Test the antenna relay coil supply voltage circuit of the Bose signal processor for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	0 V DC	Go to Step 15	Go to Step 8
8	Disconnect the Bose relay. Test the speaker supply voltage circuit of the Bose relay for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	0 V DC	Go to Step 15	Go to Step 11
9	Inspect for poor connections at the harness connector to the radio. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 15	Go to Step 12
10	Inspect for poor connections at the harness connector to the Bose signal processor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 15	Go to Step 13
11	Inspect for poor connections at the harness connector to the Bose relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 15	Go to Step 14
12	Replace the radio. Refer to Radio Replacement . Did you complete the repair?	-	Go to Step 15	-
13	Replace the Bose signal processor. Refer to Bose Module Replacement . Did you complete the repair?	-	Go to Step 15	-
14	Replace the Bose relay. Did you complete the repair?	-	Go to Step 15	-
15	Operate the system in order to verify the repair. Did you correct the condition?	-	System OK	-