7 way trailer plug

Common Automotive Test Light
color coded trailer side plug
Rear View of7 way Trailer Plug
Color Coded Truck side 7 way plug

 If you are having electrical issues with your dump trailer , you need to purchase a 12 volt test light similar to the one pictured from an auto parts or hardware store. This allows us to help you test your dump trailer instead of  just guessing what is wrong. A DC Voltmeter is also useful for testing.

Wire Colors Do Not Always Match Our Diagrams On All Trailers