My 1988 Yamaha Pro V 150 G has a problem with the power tilt button at the throttle. It always works for down but sometimes it does not for up, unless I move the wires around. When I jiggle the wires (3 flat, similar to romex), from the boat to the outboard, at the entrance to the cowling the up works for awhile. Can anybody tell me which color wires are for the up. I do not want to strip all the wires, if I can avoid it.