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Arktikos's avatar
Arktikos
Explorer
Mar 14, 2015

What amp fuse for charging circuit from truck Alt?

I have a new (to me) 2006 Chevy 2500 and a camper to go with it. This truck has a factory tow package but the red wire "battery feed" on the factory plug at the bumper is dead, even with the truck run...
wnjj's avatar
wnjj
Explorer II
Mar 14, 2015
The under-hood fusebox has a fuse called stud#1. It's 40A and feeds the trailer plug. There's no isolator other than pulling that fuse.

If you run your own wire, the fuse should be sized to prevent overloading that wire.

If you want to add an isolator to the existing wire, it's connected to a post (stud) just outside the fusebox and you can put the isolator in series there.

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