Why is my BCM not working on my door lock?
If the RAP relay is not activating, the wipers will not work at the same time that the windows won’t operate. The BCM has little to do with the operation of the door locks. The only function that the BCM accomplishes regarding the door locks is unlocking/locking using the remote.
How does the BCM control work on a Silverado?
Press the remote control door lock transmitter unlock button twice within 3 seconds and all remaining doors will unlock, the park lamps will flash and the interior lights will turn on. Press the rear button twice within 3 seconds and the liftgate will unlock, the park lamps will flash and the interior lights will turn on.
When does the BCM return to low power?
If the vehicle has been left inactive (ignition in the lock position and no BCM wake-ups) for 20 minutes, the BCM will return to the low power mode. Remote Panic Alarm. The head lamps and the horn will be activated after pressing the horn button on the remote control door lock transmitter.
What does the body control system ( BCM ) do?
Body Control System Circuit Description. The BCM is responsible for energizing the door lock relay. The door lock relay will be energized whenever the BCM receives a command from any of the door lock/unlock switch or a input from the remote control door lock transmitter.
If the RAP relay is not activating, the wipers will not work at the same time that the windows won’t operate. The BCM has little to do with the operation of the door locks. The only function that the BCM accomplishes regarding the door locks is unlocking/locking using the remote.
Is there a power lock on my GMC Truck?
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Press the remote control door lock transmitter unlock button twice within 3 seconds and all remaining doors will unlock, the park lamps will flash and the interior lights will turn on. Press the rear button twice within 3 seconds and the liftgate will unlock, the park lamps will flash and the interior lights will turn on.
If the vehicle has been left inactive (ignition in the lock position and no BCM wake-ups) for 20 minutes, the BCM will return to the low power mode. Remote Panic Alarm. The head lamps and the horn will be activated after pressing the horn button on the remote control door lock transmitter.