Iím sure there is a wiring diagram, but the manufacturers will never let us look at it. Based on my own experience with rv wiring, Iím not sure they ever look at it either.....Maybe Dan is correct...lol
On the up side, brake wiring is very...very simple.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16