I have a 1983 Volvo 280 with hydraulic tilt trim. Motor on top, metal housing. Two switch blocks. ONe is up and down, I think the other is a selinoid (not sure)The down switch operates the motor, but no movement in the outdrive. If I by bass the switch and go direct from the battery to the "green for down" wire I get the motor spinning but no movement in the outdrive. Anyone have any suggestion about what to do to ther this thing in the down position for the winter?