trim motor going down by its self

[dynatrak]

Wondering if anyone has some ideas on my little problem I have a 150 outboard and it trims up and down with the buttons on the motor, throttle, and up on the bow just fine but if I trim the motor up and let it sit for a while just out of nowhere it will start trimming down by its self until it runs out of power, its the craziest thing, I tried replacing the relay switch's and not sure where to go from there. thanks any ideas would be appreciated.

 

[NYBo]

Re: trim motor going down by its self

Welcome to iboats!

Start by isolating the switches (throttle, motor, and bow) one at a time. One of them is probably going bad. If you can catch them while the trim motor is running by itself, all the better.

 

[jonesg]

Re: trim motor going down by its self

Swap the relays and see if it trims up by itself.

 

[dynatrak]

Re: trim motor going down by its self

Well I narrowed it down to the switch on the cowling, but now i have a new problem. I un hooked that switch and left the motor up all night to see if it would go down again and it didnt which is a good thing but now when i try to trim up or down the motor just makes an errrr sound like the battery is dead but it is fully charged I checked all the fuses they are fine then I jumped the trim to see if it was maybe the motor but it goes up and down good when i jump it dont know if the solenoid is going out or what I have replaced the trim relays, dont know where to go from here any ideas.
Thanks
Daniel