Hey everyone, new to the forum. The front diff. electric actuator only works in reverse. If I move the shifter from reverse to neutral or into high/low forward the actuator disengages. I can hear it engage and have made sure it's in 4x4 in reverse. I am assuming there is a switch connected to the shifter shaft that is disengaging when the shifter is moved out of reverse. What should I look for and where?