12-24-2020, 07:06 AM
I would take the ground lead from the fan to ground near by the fan. Just use the board ground a the signal to the cube relay. This way no return current from the fan(s) through the board.
Rudy Legett
2003 Foretravel U320 4010
ISM11 450 hp Allison 4000R
Factory Authorized Aqua Hot Repair Center
Southeast Texas Area