Re: Power Trim problem on 1998 FICHT Evinrude Intruder 150
A 2 wire motor is activated by applying 12v to one of the wires and ground to the other. The motor casing does not need to be grounded for it to operate. Mistake often made when testing this motor. You may just have corroded or sticking relays. Both a connection to 12v and to ground must be made by the relays for the motor to operate and only one relay should activate at a time alternatively one for up and the other for down. You need to check both for 12v and for ground being applied to the motor when the switch is activated. Ground is applied to both motor wires when switch is not activated. You can buy inexpensive auxiliary lighting relays at the auto parts store to test with (must have 5 terminals, not just 4), but these will only be rated for 20 amps. Correct ones are rated for 30. The cheaper ones will function, but will not last as long.
My .02
-- Jeff