Negative Battery Shut-Off

[Tom F OHIO]

There is some difference of opinion as to installing the switch to the negative side (To starter) or the positive (Ground) side of the battery. I have one to the negative side and it works just fine. Attached is a rough schematic of the two options.

Thanks a lot, 47topless. I printed off your drawings.

 

[Y-Blockhead]

NO FIRE has been the result of which side the switch is installed. A properly installed switch severs ALL power to the car. Now a poor installation like message 2 or some ham fisted guy with a wrench in his hands can have different outcomes.
BTW those red handled Harbor Freight ones are very light duty when you're pulling the amps a 6V starter takes. Use the heavy duty one like in message 16.

There are many counterfeit versions of both types so beware what you buy. The one I show in the pictures above are made by HELLA in Germany