I had this happen before on an older alpha 1. There are 2 trim sensors.
One on each side of the gimble (where the outdrive pivots). One sends the
trim position, the other (I think left side) is to set the highest point you
want the trim to come up before you need to use the trailer button. I ended
up taking both switchs apart and cleaning them up, and using die electrical
compound since there was a bit of corrosion. You then need to adjust them.
the siwtches are slotted at the screews so you can turn them. After that it
was fine.

"DAVE ALONZI" wrote in message
news:2OWdnaL8vvtpFk7ZnZ2dnUVZ_uqdnZ2d@wideopenwest .com...
I though about that after I sent the post - I was concerned that the
TRAILER switch ran a different circuit in the pump which allows the drive
to extend past the limit switch. I am trying to eliminate the pump as the
problem and possibly focus on a simple failed switch in the controller.



"Buck Frobisher" wrote in message
...
"DAVE ALONZI" wrote in message
...
I have a 1999 Mercruiser Alpha ! Gen II sterndrive. The power trim does
not go up with the shift mounted control, but does activate with the
TRAILER button.

The service manual suggests that the switch may be faulty. I also have
some trouble shooting info in the manual to try. The trim pump is
located in a hard to get at location. before I try to get at the pump, I
though I would ask the group for suggestions.

Thanks in advance....

Dave


Dave, if it works from the trailer button, doesn't that eliminate the
pump as a potential culprit?

Check the switch, the connectors to it (corrosion), look for a pinched
lead between it and the stern.