Here is the diagram for 7 pin connector. Wellborn variety of trailer breakaway switch wiring diagram.

Vk 8343 Trailer Breakaway Kit Wiring Diagram Download Diagram
Trailer breakaway switch wiring diagram. 2 break away switch safety chain pocket bumper clevis figi cable pin break away switch fig. A wiring diagram is a simplified conventional photographic depiction of an electric circuit. I explain the wiring and test it. Blue wires are interchangeable on the break away switch 3. Both wires on the breakaway switch are interchangeable. See point a on the wiring diagram.
The breakaway switch is there in case the fifth wheel trailer and the truck becomes separated during towing. Connect the second wire coming out of the switch to the brake wire blue coming out of the battery box. I attached a diagram showing how a breakaway switch like part 420000 would be wired to a trailer mounted battery like the one on your loudo dump trailer. 3 cable installation 1. It reveals the components of the circuit as streamlined shapes and the power and signal connections between the tools. Splice one blue wire of the break away switch to the electric brake wire coming from the trailer side connector a see diagram on next page.
White pin for the ground. Variety of trailer breakaway wiring schematic. January 23 2020 by larry a. With this type of setup you would not want to pull the breakaway switch with the trailer connected to the vehicle to avoid a short circuit situation which could damage your brake controller. It may transfer power better hence the connector is suggested for higher level electric in the car. Connect the breakaway switchs other lead to the blue wire with a scotchlok connector.
This trailer breakaway wiring diagram version is more appropriate for sophisticated trailers and rvs. This 3 wire trailer breakaway switch wiring diagram version is more acceptable for sophisticated trailers and rvs. Splice one blue wire of the break away switch to the electric brake wire coming from the trailer side connector a see diagram on next page. Connect other blue wire of break away switch to the blue wire labeled brake from the break away box b. White pin for the ground. This connection will send power to the breakaway switch.
A wiring diagram is a simplified conventional pictorial depiction of an electric circuit. It shows the components of the circuit as streamlined shapes and the power and also signal connections in between the devices. See point b on the wiring diagram. You may have to cut into the trailer wirings sheathing to find the wire. Here is the diagram for 7 pin connector. It can transfer power better hence the connector is recommended for higher level electric in the car.
If necessary extend the wire from the trailer breakaway switch with 14 gauge automotive primary wire and solderless connectors. If that happens a safety line will pull the plunger.