GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Turn the ignition switch to the RUN position.
  2. Observe the instrument cluster gauges and indicators.

Do the ignition cluster gages and the indicators turn on?

--

Go to Step 2

Go to Step 3

2

  1. Turn the ignition switch to the LOCK position.
  2. Disconnect the seat belt/ ignition key/ lamps alarm electrical connector.
  3. Probe between the seat belt/ ignition key/ lamps alarm electrical connector terminal D2 and ground.
  4. Turn the ignition switch to the RUN position while observing the test light.

Is the test light on?

--

Go to Step 7

Go to Step 8

3

Inspect fuse 39 in the fuse block.

Is fuse 39 open?

--

Go to Step 4

Go to Step 5

4

  1. Replace fuse 39.
  2. Turn the ignition switch to the RUN position.
  3. Inspect fuse 39.

Is fuse 39 open again?

--

Go to Step 6

Go to Step 9

5

  1. Inspect for a poor connection or an open between fuse 39 terminal C1 and the ignition switch CKT 3.
  2. Repair as needed.

Is the repair complete?

--

Go to Step 9

--

6

Repair the short to ground in CKT 39.

Is the repair complete?

--

Go to Step 9

--

7

  1. Inspect the seat belt/ ignition key/ lamps alarm connector for an open or poor contact at terminal D2.
  2. Replace the seat belt/ ignition key/ lamps alarm as needed. Refer to Multifunction Alarm Module Replacement .

Is the repair complete?

--

Go to Step 9

--

8

Repair the poor connection or an open in CKT 39.

Is the repair complete?

--

Go to Step 9

--

9

  1. Ensure that the ignition switch is in the LOCK position.
  2. Reconnect the connectors and reinstall the components that were removed.

Is the repair complete?

--

Go to Audible Warnings System Check

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