GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Radio/Audio System Schematics

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

  1. Turn ON the ignition, with the engine OFF.
  2. Turn ON the radio.
  3. Turn ON the rear seat audio (RSA) controller.
  4. Select the AM/FM push button on the rear seat audio controller.
  5. Connect headphones.

Does the rear seat audio operate normally?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are both left and right audio channels inoperative at the RSA?

Go to Step 5

Go to Step 4

4

Test the appropriate speaker input circuits of the rear seat audio controller for a short, 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 7

Go to Step 5

5

Inspect for poor connections at the harness connector of the rear seat audio controller and 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 7

Go to Step 6

6

Replace the rear seat audio controller. Refer to Rear Seat Audio Control Replacement .

Did you complete the replacement?

Go to Step 7

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7

Operate the system in order to verify the repair.

Did you complete the repair?

System OK

Go to Step 2