so i have some nitrous switches powered by a splice into my cigarette lighter power wire. it all worked fine for awhile, now the fuse keeps blowing. if i turn the switches on and then put the new 40 amp fuse in it works fine, but anytime the switches are off the fuse blows????? whats in the world is going on???

 

Cigarette lighter circuits aren't made for that kind of load.

You are free to put a 40 AMP fuse in place of a smaller fuse, but any fire reminiscent of a Ford cruise control fire is on you...

Do the job right and make a proper harness for this and stop shoving fuses in because you think that is the right thing to do.

Not at all trying to be mean (tough love is more like it), but a fuse is a circuit breaker. Too much current = blown fuse.

Get it?

 

rewire everything directly off of th battery with their own sets of fuses. the cigarette lighter is not able to carry that much load