12-19-2012, 10:03 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,405
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Are you considering an automatic or manual cut-off switch?
If you are considering the addition of a battery cut-off switch,
Consider that most of the normal installations of battery cut-off switches in our cars will not actually stop the engine from continuing to run after flipping the switch. This is because the battery might be isolated by the kill switch, but the alternator will continue to power the ignition system and electric fuel pump. Some fancy wiring can isolate the electric fuel pump (IF that is what you have installed) The easiest solution is the cut-off switch from Pegasus (part#4430) which will require you to rewire your alternator output wire to the cutoff switch to be isolated.
Note: Before anyone goes out to see if their cut-off switch will indeed shut off their car - you risk a big voltage spike thru your wiring when you cycle the switch with the car running - which is not good thing for your ignition box.
The nornal cut-off switch installation will work as a theft deterrent – preventing someone from starting the car.
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