View Full Version : 4 pole Cutoff Switch
02-25-2009, 04:26 AM
The race we have our car in requires that we be able to kill all power to the vehicle with one switch. I ordered a 4-pole power cut off switch - two poles will be for the battery, the other two will cut off the alternator or ignition. Problem is, I'm crap at reading wiring diagrams. Can someone help me figure out which wire(s) I need to tap to kill power through the alternator or ignition? I don't care which one, but I'd prefer the easier of the two - we don't have much time left!
02-25-2009, 04:11 PM
Wouldn't you just have it disconnect the main positive off the battery, and the main wire from the alternator back to the Fuse box. Then the alt is keeping the system powered and the battery isn't either.
02-25-2009, 04:47 PM
The ignition coil power is from the EFi relay number 2, it is located on the drivers side inner fender in the engine bay, about a foot behind the headlight. The black wire with the red stripe feeds the ignitor and the injectors. You can cut the wire before or after the splice, then join new wire one gauge larger (use 10) and run it to the kill switch and then back to the front and splice it to the other cut end.
The alternator exciter wire is yellow, it runs into the fuse box from the alternator. Cut that and join new wire one gauge larger (use 14 i think) and run it to the kill switch, then run it back to the other cut end and join.
Here is a link to the online TSRM, the electrical diagrams specifically.
I use a flaming river push/pull cutoff switch and it has 6 poles, so my car is wired using both methods I stated. It definitely shuts the car down without hesitation. My fuel pumps are also shut down through the switch, just to be safe.
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