GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the system operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms - Instrument Panel, Gages and Console

2

  1. Turn the ignition to the ACCY position.
  2. Open the driver door.

Does the key-in-ignition chime sound?

--

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

Go to Step 3

3

  1. Place the key into the ignition switch.
  2. Turn the ignition switch to the OFF position.
  3. Close the passenger door and the rear compartment lid.
  4. Open the driver door.

Are the courtesy lamps ON?

--

Go to Step 4

Go to Courtesy Lamps Inoperative with Doors Open

4

  1. Disconnect the BCM connector C3.
  2. Use a DMM in order to test the continuity between the BCM connector C3 terminal C14 and ground. Refer to Circuit Testing in Wiring Systems.

Is there continuity?

--

Go to Step 5

Go to Step 7

5

Test for and repair a poor connection at the BCM connector C3. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

--

Go to Step 12

Go to Step 6

6

Replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

--

Go to Step 12

--

7

  1. Disconnect connector C216.
  2. Use a DMM in order to test the continuity between connector C216 terminal E and ground. Refer to Circuit Testing in Wiring Systems.

Is there continuity?

--

Go to Step 9

Go to Step 8

8

Repair the open in circuit 650 between the ignition key warning switch and S216. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 12

--

9

Test for and repair a poor connection at connector C216 terminal E. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and repair a poor connection?

--

Go to Step 12

Go to Step 10

10

Test for and repair an open in circuit 80 between the ignition key warning switch and the BCM. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and repair an open?

--

Go to Step 12

Go to Step 11

11

Replace the ignition key warning switch. Refer to Ignition Switch Replacement - On Vehicle .

Did you complete the replacement?

--

Go to Step 12

--

12

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3