what fuse to tap into

chili

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when doing a hardwire install what fuse is generally used for a permanent live connection ie would you tap into the fuse for the ecu or does it not really matter aslong as its live.

cheers
 
Depends on what car
 
It is forbidden to use fuses that protect the circuits of engine control systems, as well as systems that affect traffic safety - steering, brakes, etc.

PS: There are many other connection circuits - different lamps, cigarette lighter socket, trailer wires and others.
And before connecting, it's better if you make sure the fuse is energized with a multimeter.

It is good for such a case to have a friend - an electrician ;)
 
Last edited:
On previous vehicle I used the brake light for permanent power. Used spares/empty for my current vehicle.
 
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