anyone have a wiring diagram for a volvo trim pump. I have the harness it looks to be complete and connects directly to the battery with an 8 awg pos and neg wires. then it has 2 relay packs. a connector for the motor. the only two remaining wires are a green and a blue which i assume are blue up and green down coming from the trim switch. my question is what is being switched 12 volts or is it just looking for a ground? so what do I wire into the center pole on my SPDT a ground or 12 volts??

thanks