GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition OFF.
  2. Disconnect the radio.
  3. Connect a test lamp from terminal 10 connector C/CKT 340 (ORN) at the radio to ground.

Does the test lamp light?

--

Go to Step  2

Go to Step  3

2

Send the radio in for repair. Refer to Radio Replacement .

Is the repair complete?

--

System OK

--

3

Locate and repair the open in CKT 340 (ORN) between the radio and the fuse.

Is the repair complete?

--

System OK

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