I need some advice on connecting a battery disconect switch. I have relocated my battery on my 89 Mustang to the trunk. I understand I need to connect a remote battery cut-off switch. How do I wire the damn thing to shut off the car when I put the switch in the "off" position. I think somehow I have to tie into the alternator power? Can anyone help??????
Battery Disconect Switch???????
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You want to run the cut off switch to ground. Useing the power side of the battery, if the alternator is still turning, aka the car still on, you won't beable to cut the power. NRHA requires the cut off switch to actually cut the ground. Good luck, bro,.
loud 95
New Member
The switch has to be attached inline somewhere to the positive battery cable. The popular place on foxs seems to be behind the license plate. This way, it is not visible during street driving. At the track, just hinge your license plate so it folds down to expose the switch. I have a '95GT with trunk-mounted battery. I have a tailor box, which holds the optima and flaming river switch inside it. My "switch" is the long-rod kit from flaming river. My rod goes from the lever inside the tailor box through the trim/sheet metal of the trunk and out the bumper. NHRA stipulates that is must be a push off style switch and must be clearly labeled as such.
04sleeper
Founding Member
You could always wire the switch to a relay that would cut off the excitor wire on the alternator when the switch is cut off. This could be done with either the positive or negative side of the battery.
I just got done doing this on my car and this is how i hooked it up. I ran a wire from the positive side of the battery and the charging wire from the alternator to one terminal on the switch. On the other side of the switch I hooked up the wire that runs up to the starter solenoid. The car shuts off immediately once the switch is turned to the off position. Hope this helps and good luck with yours.
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