1983 75HP Johnson tilt/trim motor

[kevdog2000]

Hi all, my tilt/trim motor doesn't work all the time. I think the motor is bad because if I tap it with a hammer it'll start working. However, for my question, when testing the voltage I noticed that I get 12V on the blue and green wires regardless of whether I'm pushing the up or down button. The motor works correctly, meaning when I push up it goes up and vice versa. It's a 3 wire motor, blue(up), green(down) and black(ground). I'm curious if this is correct or I have an issue in the wiring.

Thanks for your help!

Kevin

1983 75hp Johnson Sea Horse

 

[emdsapmgr]

Something does not sound correct. Are you sure of the year of the engine? Was the powerhead changed ever? That 1983 engine came from the factory with a 2-wire trim motor, not a 3-wire. The last 3-wire trim systems were made up through midway through the 1981 model year. The 3-wire system takes a different electrical control box from the 2-wire motor. Are you working with matched parts here? If the motor and the control box were changed as a matching set, it should work ok. Either system is a good system, just make sure the parts match. (The control box for the 3-wire motor uses a single solenoid in the box, the 2-wire motor uses a pair of matched relays.)