I have a 1987 galaxy boat which has the tilt trim switch on the gearshift as well as a switch on the dash of the boat. When I first got the boat ( about 3 yrs ago) the switch on the gearshift work to both trim it up and down but I had to use the switch on the dash to completly lift it up all the way. Now that switch only works to tilt it down and the switch on the dash only works to trim the motor up. Why is this??? What could the problem with this??