For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the BCM Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Body Control System
2 |

1. Install the scan tool.
2. Select BODY CONTROL MODULE.
3. Select MISCELLANEOUS TEST from the Output Control menu.
4. Select SECURITY TELLTALE.
5. Press the ON button then press the OFF button and monitor the SECURITY indicator lamp.

Did the SECURITY indicator lamp light?

--

Go to Step 3

Go to Step 4

3 | The condition is not present at this time. Refer to Inducing Intermittent Fault Conditions in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | --
4 |

1. Disconnect the body control module (BCM) connector C2.
2. Disconnect the gauge cluster connector.
3. Test the security indicator lamp control circuit for an open. Refer to Testing for Continuity in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 5

5 | Inspect for poor connections at the following:

• | BCM connector C2 terminal C6

• | gauge cluster connector terminal 23

• | connector C200A terminal 28

Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 6

6 |

1. Remove the Gauge Cluster.
2. Inspect the security indicator bulb.
3. Inspect the printed circuit.

Did you find and correct the condition?

--

Go to Step 8

Go to Step 7

7 | Inspect the power and ground circuits for poor connections at BCM connectors C1 and C2. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 8 | Go to Step 9
8 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | --
9 | Replace the BCM. Did you complete the replacement? | -- | Go to Step 8 | --