trekl wrote: ↑Thu Apr 07, 2022 9:01 am
It was indeed a BCM issue. After an expensive visit to the dealer, they found a single loose wire going into the BCM that was causing the failure.
I'd be interested to know exactly what it was, if perhaps you spoke with the tech. I've seen BCM's die from car washes before, but it's always because of drowned relays, usually from a missing cover on a fuse or relay box. The relay drivers in the BCM are all transistors, so even a low-grade water short between a power terminal and a coil terminal will act like a shorted coil and blow the transistor. If they just replaced the BCM and didn't get to the bottom of why it blew, you could end up with the same issue all over again.