When I connected the jumpers to start my dead '89 735il, the horn alarm started sounding immediately. I insterted the key in the ignition, pulled all relevant fuses (horn, anit-theft system, etc.) and it wouldn't shut up. Needless to say, I can't start my car until I kill the alarm. Any help? The alarm horn and relay seems to be buried under the firewall area, quite inaccessible.