Proper installation of remote battery disconnect switch. - Ford Muscle Forums : Ford Muscle Cars Tech Forum

ScreaminC · 04-02-2005, 05:47 PM

I have the switch mounted. Had a spare tail light so I knocked out the reverse light and built a mounting plate. Looks nice.

Anyway....

The switch shuts off both the battery power and the alternator. Now, as far as wiring the alt. through the switch, would I "cut" the main wire from the alt. that runs to the + side of the solenoid or would I want to interupt one of the other wires? This is still the ext. regulator so the other wires are Orange, Balck w/ Red, and White w/ Black.

dacofa · 04-03-2005, 08:24 AM

If this is for NHRA rules, you'll have to put it too the battery side of your switch. Otherwise the car will run off the alt when the battery is shut of. As per rules the switch has to shut down all power.

NTMan · 04-03-2005, 09:00 AM

Do a quick search on here for this type topic and ckelly for the poster. Chris has a great setup on his car, very clean and professional.

Here it is, look on page 2.
http://www.fordmuscle.com/phpBB/view...rum=1&start=15

Bart

[ This Message was edited by: NTMan on 4/3/05 9:03pm ]

igo1090 · 04-03-2005, 11:30 AM

putting the alt + to the battery side of the master will satisfy tech inspectors at most tracks and kill the motor when the master is shut off.

BUT:to make the setup completely safe and cut all power to the front of the car to kill any potential for sparks and fire, a relay in the alt + wire that is powered by the car side of the master is needed. when you turn the main off, power to the relay is cut and even the alt wire to the front of the car is dead. when you power on the master, the relay is energised and the alt is now live. all this can be done in the trunk by the master. painless makes the relay for this. BUT this means you must use the master when car is parked, or you will kill the batter by keeping the relay energised. for track-only cars, doesnt matter. we turn it off out of habit when we get out of the car.

so, street car, probably just do the master cutoff. tech guy will be happy. worried about completely cutting all power to the front of the car in an emergency, go the relay route.

ponyexpress · 04-03-2005, 01:49 PM

I would recommend using the Flaming River switch. It not only has the main route to disconnect the battery but has two other internal relays so you can cut off the ignition and provide a direct ground to complete the shut down in the off position. The alt does not have to be connected to the battery side of the switch. It does meet NHRA standards. With a twist on/push off operation, I like it much better than the others I have seen. It is a good piece.

ScreaminC · 04-04-2005, 07:15 AM

Thanks guys.

I went ahead and hooked up as ckelly describes. Works great.