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I think a better choice is to install a hidden toggle switch which will interrupt the current to the coil
yeah, a car thief isn't likely to be carrying a piece of wire with an alligator clip on both ends grin

disconnects like this are put on the pos terminal - take the knob off to deter theft ... the key concept is deter, nothing will prevent theft, it's not uncommon for desireable vehicles to be stolen by folks with rollback trucks, so even wheel locks are not certain

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot