OKAY....when I jumped them it works. So now I see they will go all the way down and halway up....until the trailer switch should take over but that doesnt work

Any luck?

I am also having issue where the trim on throttle will not bring motor up only down. The the trailer button will bring the motor both up and down with no issues. Any Help???

Most likely that is the switch in the throttle ,,PITA to get to

It appears just two allen screws hold it to the Gaffrig handle, is there more to it that I can see? Any way of testing it?

My problem was the throttle trim tab and the trailer button had to be pushed at the same time! i even called the old owner and he didnt know what the problem was....I found out with dumb luck.

What was the cure you came up with?