Using a 6 way blade everything works except when I tilt left I get angle left. I'm thinking the reversing valve is not working for this function. Reversing solenoid OHM's are ok on the main valve body. Swap wires on blade solenoid, an tilt problem swaps sides. It's not in the blade. Cannot swap wires on reversing solenoid valves the wiring harness is too short. Anyone have any suggestions