Re: bypass tilt trim?
Before doing anything.... trace the wires leading from the PTT electric motor to its connector and unplug it.
Connect two jumper wires from the battery to those two electric motor wires. If the electric motor works, reversing the wires would make it run in the opposite direction.
If this test results in having the electric motor running, and possibly having your PTT assembly raising and lowering your engine (assuming the manual release valve is shut and the unit has fluid), the problem is within the related wiring which is understandable..... but not the PTT assembly. Let us know what you find.