GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the radio/audio system description and operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

Verify the fault is present.

Does the system operate normally?

--

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

Go to Step 3

3

  1. Place the ignition switch in the OFF position.
  2. Disconnect the ignition switch C200 connector.
  3. Connect a J 39200 digital multimeter between the ignition switch pins D2, and D6.

Is continuity present?

--

Go to Step 4

Go to Step 5

4

Replace the ignition switch. Refer to Ignition Switch Replacement - On Vehicle without tilt or Ignition Switch Replacement - On Vehicle with tilt in Steering Wheel and Column.

Is the repair complete?

--

Go to Step 6

--

5

Repair the short to voltage in CKT 4 (BRN), 43 (YEL), 143 (YEL) or 343 (YEL). Refer to Testing for a Short to Voltage and Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3