GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

Verify the following conditions exist before beginning this diagnostic procedure:

    • The related fuses are good
    • The related circuit breaker is good
    • The problem is not caused by installed aftermarket equipment

1

  1. Turn the ignition switch to the RUN position.
  2. Turn the radio on.

Does the radio operate?

--

Go to Step 2

Go to Step 9

2

With a test light to the ground, backprobe the Body Control Module (BCM) connector C2 terminal F.

Does the test lamp light?

--

Go to Step 3

Go to Step 6

3

  1. Disconnect BCM connector C2 and connector C3.
  2. Connect a test lamp between the BCM connector C2 terminal F and the BCM connector C3 terminal C1.

Does the test lamp light?

--

Go to Step 4

Go to Step 7

4

Connect a test lamp between the BCM connector C2 terminal F and terminal A.

Does the test lamp light?

--

Go to Step 5

Go to Step 8

5

  1. Test for poor connections BCM connector C2 and connector C3.
  2. If OK, replace the BCM, refer to Body Control Module Replacement in Body Control Systems.

Is the repair complete?

--

System OK

--

6

Repair the open in CKT 102, between the BCM connector C2 terminal F and C200.

Is the repair complete?

--

System OK

--

7

Repair the open in circuit 650 between the BCM connector C3 terminal C1 and S217.

Is the repair complete?

--

System OK

--

8

Repair the open in circuit 650 between the BCM connector C2 terminal A and S217.

Is the repair complete?

--

System OK

--

9

  1. Leave the ignition switch in the RUN position.
  2. Using a test lamp connected to ground, backprobe the BCM connector C2 terminal D.

Does the test lamp light?

--

Go to Step 10

Go to Step 13

10

Using a test lamp connected to ground, backprobe the BCM connector C2 terminal C.

Does the test lamp light?

--

Go to Step 11

Go to Step 12

11

Repair the open in circuit 75 between the BCM and the IP fuse block.

Is the repair complete?

--

System OK

--

12

  1. Test for a poor connection at the BCM connector C2 terminal C and terminal D.
  2. If the connections are OK, replace the BCM. Refer to Body Control Module Replacement in Body Controls Systems.

Is the repair complete?

--

System OK

--

13

Repair the open in circuit 4 between the BCM connector C2 terminal D and S254.

Is the repair complete?

--

System OK

--