There really isn't any wiring needed to install the Blue Ox Patriot supplemental braking system part # BLU37TR unless you have a towed vehicle that requires you to disconnect the battery when being flat towed. In that case you'd need to use an outlet kit part # RM-9332 wired to the vehicle battery to provide the power source.
I attached a link to the install instructions for this kit as well as an install video. view full answer...
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