First.. Yes, I bought Chinese junk replacement unit.. twice. This project engine has been butchered by many before me. both relays absent for up and down and was wired directly to a mom-on/off /mom-on switch on the helm. I have to assume this routing did work for a while but NOT for me. The original trim/tilt motor and reservoir unit had 3 wires.. blue, green and black. Replacement needed due to one direction not working and motor contaminated with oil. Spent 2 work days just trying to remove all 3 seized mount bolts.
These new replacements have only blue and green. after installing new relays I can apply current to the control wires blue and green and confirm the relays activate but no motor activity . Even when I apply 12vdc directly to the motor circuits still no motor function in either direction both on the installed new motor and on the new one still on the bench. I am unable to get neither of the new units to run no matter how current is applied. I have tried connecting ground in a couple different ways and still no action on either new motor. Insight on what form of grounding must be employed is helpful too. I believe one of the pics shows a ground wire at the motor mounting screw that I have installed. this went direct to the battery first and then changed to the engine main ground screw. still nothing. And also from a new mounting bolt (5/16x18) at the reservoir housing flange. I have ordered what is shown to be a Mercury specific ground (or bonding?) wire but cant find schematic to illustrate where it connects to. I am posting a few pics as inspiration for any feedback from folks having had similar issues. Any help is appreciated.
These new replacements have only blue and green. after installing new relays I can apply current to the control wires blue and green and confirm the relays activate but no motor activity . Even when I apply 12vdc directly to the motor circuits still no motor function in either direction both on the installed new motor and on the new one still on the bench. I am unable to get neither of the new units to run no matter how current is applied. I have tried connecting ground in a couple different ways and still no action on either new motor. Insight on what form of grounding must be employed is helpful too. I believe one of the pics shows a ground wire at the motor mounting screw that I have installed. this went direct to the battery first and then changed to the engine main ground screw. still nothing. And also from a new mounting bolt (5/16x18) at the reservoir housing flange. I have ordered what is shown to be a Mercury specific ground (or bonding?) wire but cant find schematic to illustrate where it connects to. I am posting a few pics as inspiration for any feedback from folks having had similar issues. Any help is appreciated.
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