I am trying to trouble shoot the tilt/trim system on this mid 80's Mercury O/B. My engine will go all the way down and then trim up to the point where you would need the trailer button. I can hotwire across the trim/tilt solenoids and I can make the engine go up and down without a problem. I removed the trailer button and the toggle switch so I have the 4 wires exposed that feed the switches. I thought this would tell me if the problem was in one of these switches but it does the same thing (down and then up slightly and then it stops moving). Once it stops on this upward part of the cycle I can get it to work again if I use a wire to go across the solenoids for 1-2 seconds then trim tilt will begin to operate properly again from the toggle/trailer switch as long as I don't go back down and try to go up then it stops.
I measured the voltage at the tilt/trim controls and I get 12 volts at the blue (up) or green (down) wire, but when I go through the cycle and when it stops on the way up I have 3 volts at those same leads. Once I do a quick solenoid hot wire across 12 volts again.
I tried disconnecting the trim tilt switch wire that is at the hydraulic cylinders at the transom and the same thing happens.
Very frustrated
I measured the voltage at the tilt/trim controls and I get 12 volts at the blue (up) or green (down) wire, but when I go through the cycle and when it stops on the way up I have 3 volts at those same leads. Once I do a quick solenoid hot wire across 12 volts again.
I tried disconnecting the trim tilt switch wire that is at the hydraulic cylinders at the transom and the same thing happens.
Very frustrated