Master electrical disconnect problem, alt exiter not shutting off car
09-01-2009, 06:51 PM
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Master electrical disconnect problem, alt exiter not shutting off car Trying to wire a master switch, switch isn't here yet, still in the mail, but I'm testing the wiring.
If I disconnect the alt exiter circuit (PIN 15 out of pcm) first, then battery second, the car shuts off.
If I disconnect the battery first and the exiter circuit second, the car stays running.
I hope that the master switch cuts the power to the alt circut a split second before the battery because if it doesn't this won't work. Or maybe the simultaneous disconnect will do the trick but its hard to do with 2 hands when testing the circutry.
Thoughts?
If I disconnect the alt exiter circuit (PIN 15 out of pcm) first, then battery second, the car shuts off.
If I disconnect the battery first and the exiter circuit second, the car stays running.
I hope that the master switch cuts the power to the alt circut a split second before the battery because if it doesn't this won't work. Or maybe the simultaneous disconnect will do the trick but its hard to do with 2 hands when testing the circutry.
Thoughts?
09-02-2009, 10:43 AM
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Is anyone using the exiter circuit to kill the alt?? I rather not run big hot cable back and forth thru the car if I don't absolutely have to.
09-02-2009, 05:52 PM
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you only need a 10 gauge wire from alt to switch,so its not that big,than run batt cable to heavy duty relay[i.e ford soliniod]and power car from there,
09-03-2009, 10:52 AM
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If I only have to use 10ga thats not bad. Isn't the factory wire that runs from the alt to the bat bigger than 10ga though?
09-03-2009, 10:58 AM
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This is not for NHRA, IHRA or any dragracing. It's for NASA roadracing and the rules say the master switch must cut power to the entire car, and thats it. No specifics on wiring as long as everything is dead minus the battery lead to the switch.
If I only have to use 10ga thats not bad. Isn't the factory wire that runs from the alt to the bat bigger than 10ga though?
If I only have to use 10ga thats not bad. Isn't the factory wire that runs from the alt to the bat bigger than 10ga though?
