A trailer brake controller (as opposed to a toad braking system)? What brand & model? They usually come with detailed instructions and if you don't have them, they are often available online.
Assuming it is a trailer electric brake controller: Basically there is a 12v power wire that should be direct wired to the battery through a circuit breaker and have a high amp rating, maybe 20A (depends on the trailer brake system). Another wire comes from the brake pedal to activate the controller for stopping. It is a merely a trip wire and does not carry high amperage. Additional wires may vary by make and model.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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