Boat manual Trim down works Trim up does not Trailer up works. Where is trim limit switch?

It normal would be on top of the motor were all your electrical comes into the motor .you would see 50 amp fuses next to them there should be 4 round black contactors that have all your wires from your tilt motor and your trim motor connected to them. but if it still works its not the contactors .try this have some one pull up on the outdrive while you hit the switch . if it goes up its your tilt motor has water in it or was damaged by hitting something . water damage is fixable only if its fresh water .salt water you need not waist your time . buy a new one .and if it is fresh water ,if you no how to take stuff apart and putt it back togeather again...the tilt motor need to be cleaned ,up and new seal kit put in it .it should work fine again .