GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

1

Inspect fuses EF1, F9, and F10.

Is fuse EF29 open?

--

Go to Step 2

Go to Step 3

2

  1. Inspect for a short circuit and repair if necessary.
  2. Replace the open fuse.

Is the repair complete?

--

System OK

--

3

  1. Turn ON the ignition.
  2. Turn ON the radio.
  3. Use a voltmeter to test for battery voltage at radio terminal 12.

Does the battery voltage match the specified value?

11-14 V

Go to Step 4

Go to Step 5

4

Repair the open circuit between the radio terminal 12 and roof antenna.

Is the repair complete?

--

System OK

--

5

Replace the audio system.

Is the repair complete?

--

System OK

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