Trial Schematic

schematic
Originally uploaded by zzm634.

I've cooked up a schematic for my wiring. For the ignition switch, I'm not exactly sure if the contactor circuit would work. It draws its power from the battery to complete the circuit, but I wonder if when the battery runs down, will the contactor disconnect? If so, this could be a cool low-voltage shutdown switch. If not, then I will have to use a seperate 12v standby battery. Also, the contactor relies on a magnetic coil; it's basically a solenoid in a box. If the voltage drops slowly, the contactor would disengage slowly, which could cause problems with arcing.

Any suggestions?