They come in two variations 7 way round and 7 way with rv blades. This is a sae j560 compliant.

7 Way Trailer Plug Diagram Del City Blog
7 way round wiring diagram. Variety of 7 pin round trailer wiring diagram. 6 way wiring diagram. I have added a photo detailing the wiring connections for the pollack heavy duty 7 pole round pin conncetor pk11700 see link. A wiring diagram is a simplified standard pictorial depiction of an electric circuit. Each component ought to be set and connected with different parts in particular manner. It reveals the parts of the circuit as simplified forms as well as the power and also signal links between the tools.
7 pin trailer wiring diagram with brakes 7 pin flat trailer wiring diagram with brakes 7 pin rv trailer wiring diagram with brakes 7 pin trailer wiring diagram with brakes every electrical arrangement is made up of various different parts. 7 way plug wiring diagram standard wiring post purpose wire color tm park light green battery feed black rt right turnbrake light brown lt left turnbrake light red s trailer electric brakes blue gd ground white a accessory yellow this is the most common standard wiring scheme for rv plugs and the one used by major auto manufacturers today. The 7 way round trailer plug is to be distinguished from 7 way rv blade plugs. 4 way wiring diagram general trailer wiring. I attached a diagram that shows how most 7 way rounds like the pk11720 that you referenced will get wired up. If not the arrangement will not function as it ought to be.
7 way trailer connectors are found on most recreational vehicles and are used on larger gooseneck 5th wheel boat and utility trailers. Use this 7 pin trailer wiring diagram to properly wire your 7 pin trailer plug. This drawing from mark bruss shows the relationship of the 7 round to 7 flat plugs and how only three wires are common. Stop into our harrisburg pa dealership today or call to learn more. On most recreational vehicles. The wiring connections and placement are different.
7 pin trailer wiring diagram with brakes. Be sure to review your own trailer connector before wiring. The ways to convert from 7 pin commercial plug to the 7 blade light duty plug is covered intaillight converters. 7 way trailer connectors are used by the following vehicle types. As long as you got yours wired up correctly and your trailer taillights and brakes are functioning correctly thats all that should matter but occasionally there are some trailers that end up wired slightly different than others so the diagrams we offer dont match up perfectly. Large 5th wheel trailers.
And we offer so much more than that. 7 way trailer wiring diagram is explained in details in the picture and the table below. They supply power to the taillights turn signals brake lights trailer brakes reverse lights auxiliary power and include a ground connection. Wiring diagram for 7 way round pin trailer and vehicle side connectors. Wiring pollak j560jun93 to 7pin round narva truck to trailer thank. Were happy to help guide our customers to the right trailer or snow plow for them.