My starboard trim pump is not working and drive is in the +7 setting. Ho do I diagnose if it is a wiring issue (including loose connection) or pump went south. Thses are the old trim pumps. Anyone have a manual? Or can I at least let the pressure out and the drive down some way until I get it out to a shop?

Wannabe

It's usually the solenoid on the trim pump that goes out. You can jump it with a short piece of wire to find out. There are a few posts on this with more details.

Easiest/non-messy way to adjust drive in the mean time would be to disconnect the trim rams from the drive.

if you hit trim button and solenoids click, then it isn't switches. jump solenoids and see if trim runs. then completly bypass sol and see.if motor runs jumping across big posts on top, solenoid is bad. if runs by firing solenoid trigger wire, switches or wiring is problem. if you motor does not run when jumping across big posts on top, motor is probably the issue. FIRST; before you do anything, make sure you have 12 volts at big wire on top of sol and make SURE the ground is connected...

i found one of my grounds on pump was loose with mine. Always worked on land but when out on water i would have intermittent issues. after retightning havent had issue since.

Turns out it must be the "in" solenoid because when I jump it works. Works on the out from the switch.

Wannabe

Uhhh OK.

Wannabe

It was the solenoid- Replaced it and all works. Man, not an easy job but not that bad - about 1.5 hours.

Wannabe

Is your boat the one that sits behind Troy Oakland airport?

Yes.

Cool. We live just to the east in Clawson. See it while driving to Meijer. Small world, my trim on port side quit on Sunday lol.