Hawke Dump Trailer Wiring Diagram | Free Wiring Diagram Assortment of hawke dump trailer wiring diagram. A wiring diagram is a simplified conventional photographic depiction of an electrical circuit. It shows the parts of the circuit as simplified shapes, and also the power and signal links between the gadgets.Author: Ricardolevinsmorales Instructions to Wire Dump Trailer with Electric Brakes Our wiring page, see link, has photos that detail the wiring configuration of the 7-Way RV trailer connector for you to check out. You will need to test the functions of each wire using a 12 volt battery to determine their function. Once you know the function, you can use our trailer connector wiring diagram to make the proper connections.