Disconnected and reconnected Body Control Module and now lights don't work right
I had headlight problems and the mechanic told me it was a bad BCM. I got one at the junkyard. I take it out my BCM and put in the new one and the headlights work proving that the BCM is bad. The BCM from the junkyard however doesn't allow me to turn on the AC.
I put my original BCM back on and now the wipers won't work and the turn signals won't work and even the Key fob doesn't work.
Does anyone know if just disconnecting the BCM can mess it up?