It removes more danger from the equation.

It's like when you connect jumper leads, if you connect the positive first holding the negative away from the receiving car, then there's nothing to short out on. You could connect the positive to the bumper and not cause an issue in the world, there's no chance of spark. Connect the negative first and as you bring the positive in you could clumsily strike an arc on anything around the engine bay or car destroying electronics, melting metal, ruining paint and possibly popping your own battery.

Same with switching the negative terminal from the battery off. Switch it off down the back of the car, and when you have a bingle then it doesn't matter if your battery cable gets pushed up against anything (like the exhaust pipe in the tunnel or crushed between the rear subframe and the car). You have removed the grounded chassis from the equation, and face it, this is where the real danger is. Anything can strike against the chassis anywhere in the car.

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SooperDooperMiniCooperExpertEngineering

All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.

This is CAMS approved and fixes the run on problem

http://www.minispares.com/product/Class ... akers.aspx

Leave the negative terminal grounded to the car and touch the positive terminal, you'll figure out why you should isolate the battery by cutting the grounding.

Pictures of the system once all connected would be appreciated.

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Regards,

Mike
"He who dies with the most toys wins."

I have a simple kill switch in my mini..
Hidden under the dash is a switch. If I flick it, it cuts power to the distributor allowing the car to turn over but not fire.
Some idiot could sit there for hours trying to get it to fire but it won't.
No spark, no bang. Simple really!!
No battery cut off switch for me..

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2000 Holden Rodeo TD - The Daily
1998 JDM Mitsubishi Lancer Evolution V -The Weekender
1977 Leyland Mini 998cc, 1293cc in the works - The project
1977 Leyland Mini Van - Sold
1966 Morris Mini Deluxe - Sold
2004 MINI Cooper S Chilli - Sold

I like the sound of this one , how did you wire it up ?

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Project Pickles is ALIVE!!!!! Click Here!
Success is so much sweeter after the struggle

I didn't do it..
Got my local mini mechanic to rig it up..
Ill ask him and send you a PM in the coming days!!

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2000 Holden Rodeo TD - The Daily
1998 JDM Mitsubishi Lancer Evolution V -The Weekender
1977 Leyland Mini 998cc, 1293cc in the works - The project
1977 Leyland Mini Van - Sold
1966 Morris Mini Deluxe - Sold
2004 MINI Cooper S Chilli - Sold

Awesome thank you.

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Project Pickles is ALIVE!!!!! Click Here!
Success is so much sweeter after the struggle

Tony B. for the race car would there be a solution found by running a new heavy duty earth cable up to the cabin ( where the switch needs to be to conform with the regs), running it through the switch and then onto the body? If you were paranoid about cable damage in an accident you could run it through flex conduit (the grey 240v stuff) inside the cabin (if the rules said this was ok).

This way you could probably switch both sides and get the best of both worlds.

BTW my road car has the green screw knob type on the negative terminal of the battery. Works a charm and cheap as chips. I turn it off when I park it in the city and leave it at home both for security amd fire. Not that it would delay a proper thief much but its better than nothing.

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Cheers
Alec
1275LS - July 78 - XNFAD18Y/102918

That's what I've gone with

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Tim