VEHICLE WAS INVOLVED IN FRONTAL COLLISION WITH RUN OFF TIRE FROM A TRAILER BEING PULLED BY A PICKUP TRUCK. FRONTAL DRIVER SIDE RECEIVED DAMAGE TO ELECTRICAL WIRING HARNESS WHICH SHUT DOWN ONBOARD COMPUTER SYSTEM. UPON IMPACT THE VEHICLE SEIZED OPERATION AND SHUT DOWN AIR BAG DEPLOYMENT. STEERING CONTROL WAS LOST DUE TO HALF SHAFT JOINT WAS SHEERED APART. *TR