I have a 2003 Audi A4 and I am installing a Pioneer Avic-Z3 Navigation Unit. I unplugged the blue harness plug at the instrument cluster and clamped the brown and red speed sensor wire for the GPS. When I plugged the harness back in, and tried to turn on the car, the car turned on, but won't stay on for more than about 2 seconds. Does anyone know how to fix this problem? Please let me know if you do...