I bought a used end dump trailer. I can't find a wiring diagram for the tailgate air valve. It has two wires. I tried adding power to the lines and nothing happened. Does anyone know the wiring for a valve like this (it has two wires). Is one a power and the other a ground? Thank you
One power and one ground, it doesn't matter which is which since it's just a coil. Doesn't matter which direction the electrons flow Have you checked it with a multimeter? If there's no continuity through the coil you're going to need a new one ETA - Might be this one, clean it off and look for numbers Air Solenoid Valve, Three Way Solenoid
