What Are the Causes of Cruze Body Module Failure?
3 Answers
Due to the use of dual-filament bulbs in the brake lights of vehicles like the Cruze, a sudden increase in current when the brake bulb fails can directly burn out the body control module. Other potential causes include failure to promptly replace a damaged brake light, failure to promptly replace a faulty trunk switch, or modified wiring, all of which may lead to the burning out of the chip in the body control module's computer board. Below is an introduction to the body module: Introduction: The Body Control Module (BCM) is a powerful control module designed to implement discrete control functions and manage various electrical appliances. Functions: The functions of the Body Control Module include: power window control, central door lock control, remote security, lighting system control, heated rearview mirror control, instrument panel backlight adjustment, and power distribution.
I've been repairing cars for over a decade and have encountered numerous issues with Cruze body control modules. The most common causes include circuit short circuits, such as water ingress in the engine compartment causing rust and corrosion on wire connectors, or rainwater seeping in and burning out the module. Additionally, unstable battery voltage and frequent ignition impacts can easily crash the module. Outdated software systems that aren't updated in time can also cause bugs, leading to erratic control of lights and windows. Diagnosis is straightforward—just use a scanner to read the error codes, which can usually pinpoint the issue. If the module is damaged, it must be replaced, costing several hundred to a thousand dollars. To prevent such issues, avoid parking in low-lying areas exposed to rain, regularly check fuses and connectors, and address minor issues before they escalate. Always test your lights before long trips to avoid accidents due to sudden failures.
I had a body control module failure with my Cruze before, and it was really annoying. After starting the car, the wipers would move randomly and the door locks malfunctioned. It turned out to be due to aging internal wiring and oxidized circuit board contacts interrupting signals. The possible causes were that my car had been parked outdoors for too long—summer heat and sun exposure deformed plastic components, or winter thermal contraction/expansion created cracks allowing moisture to corrode electronics. The mechanic mentioned the Cruze's module placement has some design flaws, being near the wheels where water splashes easily. That repair cost me over 800 yuan and made me late for work. I recommend owners avoid prolonged parking under direct sunlight, use garages or car covers for protection, and get annual electrical inspections. If strange symptoms appear, visit the dealership immediately—delaying can double parts costs.
