Troubleshooting Hints

Technicians should not replace the BCM unless specifically directed to do so by diagnostic procedures. Most system concerns are traceable to faulty wiring, connectors, or components. The BCM itself is very reliable, and is not likely the cause of a fault. BCM replacement before complete diagnosis is performed will likely lead to a recurrence of the fault.
The BCM electrical connectors are designed with indexing tabs and slots, and will only fit one way. The connectors do not require excessive force when installed correctly. Installing the connectors incorrectly can cause damage to the connectors, the BCM or other vehicle components or systems.