I have an 855 D gator that the power steering was having intermittent issues. Now it quit all together. Also the speedometer quit working. I cleaned all connections, tested voltage and grounds, replaced speed sensor, and check speed sensor wires. Everything checks out. If I unplug the power steering unit connector that has the speed sensor wires in it, the speedometer works fine. I’m convinced the power steering unit is at fault, but would like to know for sure before replacing it. Any ideas? Thanks.