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vettezx-6 · 03-24-2015, 09:38 AM

There are two styles of 7 pin plugs that I know of. One is a "blade" style that is commonly called an RV plug. It is what is we are used to seeing on utility and car trailers.

The other style is a round pin, commercial/utility plug. The best place to find an adapter for that style would be a truck stop or Truck-Pro. I don't know that i have ever seen a 7 round pin to flat four adapter. You may have to use two adapters. One to go from 7 round to 6 round and another to go from 6 round to 4 flat.

If you don't need that round pin plug, I would replace it with the more common 7 pin blade style.

03-24-2015, 09:38 AM	#2
vettezx-6 Registered User Join Date: Apr 2004 Location: IN Posts: 9	Re: Trailer Wiring There are two styles of 7 pin plugs that I know of. One is a "blade" style that is commonly called an RV plug. It is what is we are used to seeing on utility and car trailers. The other style is a round pin, commercial/utility plug. The best place to find an adapter for that style would be a truck stop or Truck-Pro. I don't know that i have ever seen a 7 round pin to flat four adapter. You may have to use two adapters. One to go from 7 round to 6 round and another to go from 6 round to 4 flat. If you don't need that round pin plug, I would replace it with the more common 7 pin blade style.