Parts Needed to Add 7-Way to Rear of Dump Trailer

Question:

Hello, I have a dump trailer that Ill be towing behind my truck, which is the round 7-pole connector to my truck. Ill be towing my enclosed trailer behind the dump trailer, which also has a 7-pole connector. I need to somehow get a female truck side connector wired up to the back of my dump trailer, so I can connect my enclosed trailers male end to the dump trailer. Both trailers have brakes that I would prefer to work while towing in this configuration. Any help with what color wires do what would be very helpful, as well. Thanks,

asked by: Chris R

Expert Reply:

What you are going to need is the 7-way socket and lead part number # PK11898 which comes with the wiring you'd need to tap into your trailer wiring as well as a bracket to mount the 7-way. You'd wire the 7-way to your trailer wiring using the following as a guide for what the 7-way has:

Red - Left Turn and Stop - 14 gauge
White - Ground - 10 gauge
Blue - Electric Brakes - 12 gauge
Green - Right Turn and Stop - 14 gauge
Black - Battery - 12 gauge
Brown - Running Lamps - 14 gauge
Yellow - Backup Lamps - 14 gauge

Determining the correct wiring for the trailer to the 7-way can be done by tracing the wires to each of the taillight functions on your trailer or by using a circuit tester like part # PTW2993 to test the wiring and determine function.