Mooseman
Moderator
Replacing that fuse won't fix it. If that is a ground wire, it'll just blow again. Trace that wire to where it goes. If it goes to the block, I would connect it to the battery.
That fuse won't do anything for you unless you connect that smaller red wire to it and even then, will only benefit a trailer with a battery for charging.
That fuse won't do anything for you unless you connect that smaller red wire to it and even then, will only benefit a trailer with a battery for charging.