GM Service Manual Online
For 1990-2009 cars only

Radio Display Inoperative, No Sound From Speakers

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Radio Audio System Check?

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Go to Step 2

Go to Diagnostic System Check - Radio/Audio System

2

Inspect the RDO/CD fuse #5, in the instrument panel electrical center for an open.

Is the fuse open?

--

Go to Step 6

Go to Step 3

3

  1. Disconnect the radio connector C1.
  2. Connect a test light from the connector C1 terminal 10 to ground.

Does the test light illuminate?

--

Go to Step 4

Go to Step 7

4

Connect a test light between the radio connector C1 terminals 10 and 5.

Does the test light illuminate?

--

Go to Step 5

Go to Step 8

5

Replace the radio. Refer to Radio Replacement .

Is the repair complete?

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Go to Step 9

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6

Repair the short to ground in circuit 440.

Is the repair complete?

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Go to Step 9

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7

Repair the open or high resistance in circuit 440.

Is the repair complete?

--

Go to Step 9

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8

Repair the open or high resistance in circuit 351.

Is the repair complete?

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Go to Step 9

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9

  1. Clear any DTCs which may have set.
  2. Operate the system in order to verify the repair.

Did you correct the condition?

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System OK

Go to Diagnostic System Check - Radio/Audio System