Can anyone explain to me how my trim sender works? Or doesn't work. I have a 1999 merc. 115 2stroke elpto. I have the correct merc. Service manual and it says nothing about how the trim sender works or how to test it. I want to get it operational because i have a guage for it and i want all guages to work just because. Can any send me a link or just pass along any experiences they have had. Thank you. Brian