Very unusual for a Merc to stop working both up and down at the same time. Check the wires going to the trim motor for voltage when switch activated. If it gets voltage the trim motor is bad, if not check supply voltage to the relays. then the relays. Never seen a re-set on a Merc trim system.
“The world will not be destroyed by those who do evil, but by those who watch them without doing anything” Remember what He has done and remember that He is not done yet! GOD IS GOOD