It's ALIVE! Yesterday my rear a/c blower turned itself on full blow....ignition off and key removed. Then turned itself off briefly and then started up again. On/OFF back and forth by itself. Front a/c blower is fine. Rear blower controls front and mid coach have no impact. Finally got my flashlight and pulled the 30A fuse to shut it off. I'm guessing there's a wire short somewhere. Any thoughts on tracking it down and on gaining access to the blower. 2003 Envoy XL. Thanks.