My motor (1989 35 hp Merc) came with hydraulic tilt/trim with which I now have a problem. It will neither raise nor lower the engine. When I press the button to raise or lower the engine, all that happens is a click which sounds like a solenoid activating. No hum heard at all. I have checked the oil level and added 1 and 1/2 oz of oil, and I cleaned the two wire terminals. Still nothing. Can you help trouble shoot my problem? Can the motor be checked by just connecting one of the two wires to a 12 volt battery or will this cause another problem?