Quote:
Originally Posted by fordnut85
Don't forget to check your grounds. Some people like to use the trailer ball to ground the trailer to the truck and it never works right. That battery is just for the breakaway, it won't affect the service brakes at all.
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Exactly. Some trailers are wired to use the ball as the ground and if there is any rust, paint, grease, etc. on the ball, tongue, receiver, hitch mounts it will screw with the connectivity. It's usually easier to add a dedicated ground than to trace all the places that could be failing to ground.