I have a 99 Mercury 50hp outboard motor. The tilt was working fine during a recent fishing trip for 3 days then while on the water the tilt stopped working. I ran a test light from the switches all the way back to the tilt pump, I have power in all locations. I do hear a click when I push the tilt up or down at both the throttle control handle and the switch on the motor itself. The boat does not have a fuse box or panel that I can locate. I did lift the motor to access the tilt pump, it is full of fluid. What could be my problem?