I have wondered about those things too.
I do not have a toad.
I have never checked to see if all the pins (7) are working either.
I do know an adapter to 4 pin worked a small trailer lights fine.
Since there is no electric brake booster present in the cab, like on my pick up truck, I always wondered what I would do, would I need to have one installed, run it myself, trace present hitch plug wiring, gosh, dunno?
Meanwhile I do not pull that trailer, the one with electric brakes, with the RV.
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Rusty
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