this mite sound dumb. but. what would it be good for?. just so u dont hav to go threw the hassle to disconect the battery to reset ECU or sumthing?

 

i think some of the racing events require a battery cutoff, but it might also help in theft prevention (even if its clear as day to see)

 

Those are nice, especially if you do frequent electrical mods or need to disconnect the positive often. Once I do all my power mods, windows and locks, alarm, stereo, etc. I'm going to be putting in a resettable circuit breaker right at the battery so I'll just use that to disconnect power when I need to. As a safety feature a person could do a couple things to cut power in an emergency. One you could put a switch in the dash that tripped a relay which in turn would cause a direct short, causing the breaker to trip. Two, if you knew enough about the airbag wiring for the car, you could use a wire from that to trigger the relay, which would cut the battery when the vehicle was involved in an accident. Similar to the effect of the explosive charges that break battery connections on some german cars. You could also use that trigger to cut power to the fuel pump as a safety measure. But I'm digressing.

 

it's still okay that i put that on the negative side right? it seems to work on the neg side.

 

Yeah, it's actually a little better to switch the negative, less spark, which means less wear on the contacts.

 

nice

 

i think some of the racing events require a battery cutoff, but it might also help in theft prevention (even if its clear as day to see)

Most road & rally events require it to be more accessible though. In Canadian Rally, it has to be in reach of the driver or co-driver.

 

SCCA requires it to be within reach of the driver AND outside parties. One of the drag race sanctioning bodies requires it to be exposed at the rear of the vehicle.

The item above is not for a race car.

 

that's a neat little contraption. would come in useful just popping a switch instead having to loosen\remove three nuts all the time. additionally, i suppose it would be helpful to the racer type who doesn't drive daily and wants to save the battery from going dead. but i'm just guessing. and yes, negative is the terminal you want to disconnect.