I am repairing a burnt Cat 287b skidsteer and need help wiring the two electrical plugs for work tool. I assume it is same pattern for all skidsteers. I have Cat wiring diagram, but it looks to me that other than the ground wire, all of the pins are hot when energized? Can this be true? I thought that a least a few were relay controlled by joystick or dash switch? Does anyone have a more clear diagram to follow? Thanks!