GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Radio/Audio System Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

Are all of the speakers inoperative?

--

Go to Step 7

Go to Step 3

3

Adjust the radio balance and fade to the suspect speaker.

Does the speaker operate properly?

--

Go to Audio System Troubleshooting Hints

Go to Step 4

4

  1. Remove the radio. Refer to Radio Replacement for service procedure.
  2. Disconnect connector C1 from the radio.
  3. Momentarily touch a 1.5 volt battery between the appropriate speaker circuits.

Does the speaker emit an audible pop?

--

Go to Step 8

Go to Step 5

5

Test the circuits of the appropriate speaker 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 11

Go to Step 6

6

Inspect for poor connections at the speaker. 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 11

Go to Step 9

7

Test all speaker circuits for a short to B+ or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 11

Go to Step 8

8

Inspect for poor connections at the harness connector of 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 11

Go to Step 10

9

Replace the speaker. Refer to Speaker Replacement or Radio Rear Speaker Replacement for service procedures.

Did you complete the replacement?

--

Go to Step 11

--

10

Replace the radio and perform the set up procedure. Refer to Radio Replacement and Radio Setup .

Did you complete the replacement?

--

Go to Step 11

--

11

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2