What are the symptoms of a BCM body control module failure?
2 Answers
BCM body control module failure can cause some electrical appliances on the vehicle body to malfunction, such as turn signals, wipers, window regulators, door locks, etc., all of which may stop working. The following is relevant information about the body control module: 1. Function: The main task of the body control module is to simplify operations and reduce manual operations by occupants to avoid distracting them. 2. Composition: The automotive body control system includes vehicle safety, comfort control, and information communication systems, mainly used to enhance vehicle safety, comfort, and convenience, as well as to connect with the outside of the vehicle and coordinate the functions of various electronic control units in the vehicle.
My previous car had a BCM failure, and the symptoms were quite obvious: the light switch didn't work, the daytime running lights stayed on or went completely dark; the door lock button malfunctioned, making it impossible to lock or unlock the car, requiring manual key turning every time; the power windows acted up, getting stuck halfway; the wiper system activated incorrectly, wiping the windshield on sunny days; and occasionally, the remote key failed, preventing entry into the car. The most annoying part was how these issues came and went—like the turn signal suddenly stopping during driving, nearly causing an accident. The mechanic explained that the BCM is like the car's mini-computer, and when it fails, the circuits go haywire, usually requiring module replacement. I promptly took it to the dealership to get it fixed. My advice? Don’t ignore these small warning signs—they impact safety and can turn daily driving into a mess.
