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Heavy-duty trucks rely on complex electronic systems to operate safely and efficiently. One critical component is the Body Control Module (BCM), which manages various electrical systems and functions. However, BCMs can malfunction, causing issues with lighting, power windows, and other essential systems. In this article, we'll delve into common issues with BCMs in heavy-duty trucks and provide a step-by-step guide on troubleshooting and repair. Common Issues with Body Control Modules (BCMs) i …