Killswitch

[AtomicX]

Hey I have my battery relocated to the trunk and the drag way I go to told me that I need to have a kill switch when running a battery mounted in the rear. Whats the best way to wire the kill switch?

[Redog]

I would say between the battery and the altenator and a fuse. Just use the correct gauge wire. (8 gauge I think)

[jabartram]

from the battery to the kill switch, kill switch to the starter. they need to be able to disconnect in case of accident.

[Redog]

Why to the starter.

I thought it did nothing after the car was running

[clutch1]

How about this...

Chassis > Bolt > Wire > Killswitch > Wire > Negative battery post


Simple enough..

[AtomicX]

How about this...

Chassis > Bolt > Wire > Killswitch > Wire > Negative battery post


Simple enough..

Dragway said it needs to be on the positive terminal to disconnect the alternator.

I was thinking of this, positive feed from engine bay to the switch, then from the switch to the positive terminal on the battery.

[jabartram]

Dragway said it needs to be on the positive terminal to disconnect the alternator.

I was thinking of this, positive feed from engine bay to the switch, then from the switch to the positive terminal on the battery.

basically they need to be able to kill the power to the vehicle in the case of an accident or emergency, which means kill the switch kills the power to the vehicle.

on older vehicles the alternator wire was either strait to the battery or to the starter.

[[ion] C2]

I was thinking of this, positive feed from engine bay to the switch, then from the switch to the positive terminal on the battery.

yep you just need to break the circuit

[AtomicX]

Now any ideas where to mount the switch?

[jabartram]

it needs to be easily accessible at the rear of the vehicle if i remember correctly.

Blackjack should have one, hopefully he will chime in.

[AtomicX]

Having it the way I said it would definitely disconnect the alternator as well?

[jayson_waltz]

^yea, just put in inline on the wire that goes from the alt to the battery. done.

[BlackJack]

Doesn't really matter about whether it's positive or negative really. I just ran battery neg/switch/bumper bracket. Really if you lose your ground, your computer dies = no ignition = engine dies = alternator stops making juice = no electrical. However, in any case I'd follow the guidance of the track officials, because they're the ones to tell you to "get your fucking car outta here" instead of giving you the thumbs up.

Oh, and for location, I mounted mine in the back bumper on the upper slope just below the trunk.

[wrestlingandrunning]

I have two battery's but a circuit breaker. Do you guys think that is well enough, because I would like to get some practice going down a drag strip before I get my z going.

[AtomicX]

Doesn't really matter about whether it's positive or negative really. I just ran battery neg/switch/bumper bracket. Really if you lose your ground, your computer dies = no ignition = engine dies = alternator stops making juice = no electrical. However, in any case I'd follow the guidance of the track officials, because they're the ones to tell you to "get your effing car outta here" instead of giving you the thumbs up.

Oh, and for location, I mounted mine in the back bumper on the upper slope just below the trunk.

The reason they wanted me to use the positive is because it ensures the deactivation of the alternator exciter wire.

So would the setup like I said earlier work to shut off everything?

Positive feed going into trunk to the switch, then from the switch to the battery in the trunk.
Also can I get a picture of your switch on your bumper blackjack?

[cherrington17]

The reason they wanted me to use the positive is because it ensures the deactivation of the alternator exciter wire.

then they don't know how electricity works. I know you need to follow their rules (like bj said) but if there isn't a full circuit, then there is no power anywhere.

cutting power or ground, cuts electricity as a whole.

[AtomicX]

then they don't know how electricity works. I know you need to follow their rules (like bj said) but if there isn't a full circuit, then there is no power anywhere.

cutting power or ground, cuts electricity as a whole.

I have two grounds, one ground under the hood thats grounded to the frame (the grounds that went to the old battery under the hood), and a ground on the battery in the trunk going to the frame.

[BlackJack]

yeah, here it is. Sorry the trunk is open, but it's offset to the passenger side. You should be able to see the "Moroso" label in red on the bumper.
http://i81.photobucket.com/albums/j202/qaddamage/noReason/killswitch.jpg

[Redog]

A little OT but I was wondering if I could put one of those in, just like that, under the dash for a kill switch so the car won't start? :ninja:

[wrestlingandrunning]

A little OT but I was wondering if I could put one of those in, just like that, under the dash for a kill switch so the car won't start? :ninja:

Yep you can, I'm going to put in a fuel pump relay switch hidden in my car.

[AtomicX]

yeah, here it is. Sorry the trunk is open, but it's offset to the passenger side. You should be able to see the "Moroso" label in red on the bumper.
http://i81.photobucket.com/albums/j202/qaddamage/noReason/killswitch.jpg

What stops teenage kids from switching the switch on and off?

[BlackJack]

Nothing.

It's happened a grand total of twice in the several years I've had it installed, and that was at store parking lots. It doesn't do anything bad to my car but reset the fuel trims. I find out when I use the key fob and the doors don't unlock, then I simply go around back and switch it back on. No harm done.

[AtomicX]

Nothing.

It's happened a grand total of twice in the several years I've had it installed, and that was at store parking lots. It doesn't do anything bad to my car but reset the fuel trims. I find out when I use the key fob and the doors don't unlock, then I simply go around back and switch it back on. No harm done.

And resets your clock -_-

[BlackJack]

yeah, but negligible impact. I knew that when I put it on, and decided before hand that it would be an acceptable occurrance.

[AtomicX]

yeah, but negligible impact. I knew that when I put it on, and decided before hand that it would be an acceptable occurrance.

I was thinking about putting a spacer on my back licenses plate and hide the switch behind the plate, and when I'm at the track to simply just take off my plate.

[BlackJack]

Not a bad idea.

That way it wouldn't have permanent cosmetic damage.

Or you could do what I was considering, which was to put both battery terminals on the same pole of the switch when you're daily driving so the switch has no effect, then switch one terminal to the opposite pole when you go to the track.

[jabartram]

or just remove the screw that holds the handle onto the switch, thats what i did on my mustang. there was just a small post sticking up.

[AtomicX]

Not a bad idea.

That way it wouldn't have permanent cosmetic damage.

Or you could do what I was considering, which was to put both battery terminals on the same pole of the switch when you're daily driving so the switch has no effect, then switch one terminal to the opposite pole when you go to the track.

It would have permanent cosmetic damage since I would need to drill into the car behind the plate, you just wouldn't see it with the plate on.

[BlackJack]

I wouldn't really call that cosmetic damage if you can't see it in it's normal state (license plate on).

[AtomicX]

So blackjack, did you run a ground wire from the front to the rear?

So I just tried something, I started the car, then disconnected the grounds, but the car still ran?

[BlackJack]

then you didn't disconnect all the grounds. The ignition and computer can't run without a complete circuit. You're grounding somewhere else that you aren't aware of.

[Monza]

The alternator is physically grounded directly to the engine. Some cars will run with the battery disconnected. Others stop running or burn up expensive electronics right away.

I'm not testing mine to find out.

[AtomicX]

Finally figured out how to do it using the positive,

I have split the positive so one side goes to each pole, and then disconnected the alternator power wire, and ran a new wire going from the alternator to the pole on the switch on the side that the battery is on.

Works great.