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Circuit/System Description

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

The body control module (BCM) controls the ignition main (underhood) and ignition main (rear body) relays through the control circuit by applying voltage to the ignition run/crank relay coil control circuit. The ignition main (underhood) and ignition main (rear body) relays are energized when the ignition switch is in the RUN or the CRANK position, or when a remote start is requested

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