GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

DEFINITION: The fasten belts indicator lamp in the instrument cluster does not turn on when turning the ignition key from the OFF to the RUN position with the driver's seat belt unfastened. However, the BCM sounds the fasten seat belt reminder chime for six seconds.

1

Was the Audible Warnings System Check performed?

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Go to Step 2

Go to Audible Warnings System Check

2

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

Does the instrument cluster gages and indicators operate normally?

--

Go to Step 3

Go to Instrument Cluster System Check

3

Was the BCM Diagnostic System Check performed?

--

Go to Step 4

Go to Diagnostic System Check - Body Control System in Body Control System

4

  1. Disconnect the BCM electrical connector C2.
  2. Connect a 5A fused jumper between B+ and the BCM harness connector C2 terminal D12.
  3. Observe the fasten belts indicator lamp.

Is the fasten belts indicator lamp on?

--

Go to Step 8

Go to Step 5

5

  1. Remove the instrument cluster.
  2. Remove and inspect the fasten belts indicator lamp bulb from instrument cluster.

Is the fasten belts indicator lamp filament open?

--

Go to Step 9

Go to Step 6

6

Using a J 39200 digital multimeter (DMM), measure the resistance between the BCM harness connector C2 terminal D12 and the instrument cluster harness connector C2 terminal F.

Is the resistance measured within the specified range?

 

Go to Step 7

Go to Step 10

7

Using a test light, connect between B+ and the instrument cluster harness connector C1 terminal I.

Is the test light on?

--

Go to Step 11

Go to Step 12

8

    • Inspect the BCM connector C2 terminal D12 for a poor connection.
    • If the connection is OK, then replace the BCM. Refer to Body Control Module Replacement in Body Control System.

Is the repair complete?

--

System OK

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9

Replace the fastener belt indicator lamp bulb.

Is the repair complete?

--

System OK

--

10

Repair the poor connection or open in circuit 529.

Is the repair complete?

--

System OK

--

11

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

--

System OK

--

12

Repair the poor connection or an open in circuit 1450.

Is the repair complete?

--

System OK

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