"Jack
We have just been dissc
"Jack
We have just been disscusing a similar question a few posts before, Check your manual which is relevant to your model, the wiring may esentially already be there in your harness so you may only have to fit your trim sender unit and gauge then hook them up.
If you have an understanding of marine wiring systems and are a bit handy, you should be able to do the job yourself but if you are not confident, I would consider paying someone to do it for you.
The trim gauge itself is powerd by the 12v feed to your instruments and the trim sensor is the earth/ground side of the circute, the sensor is effectivly a variable resistor to ground.
Hope that helps
Cheers
Peter C"