DIY - Fitting a fuel Cut-Off Switch to prevent Vehicle Theft

[matnors]

for fuel pump.. which wire recommended to add switch? +ve wire or gnd (-ve) wire?

 

[GTpuI]

Thankz bro...very nice idea.I like yr way coz it is more save for me.Install with relay and fuse.It can avoid a risk of spark n overcurrent or voltage spike during start.If u want to be more safety,install the steering quickshift.So the fxxxxx thieft have a lot work to do and will surrender (hopefully).