I have a class A that has a 7 pin plug. I need an adapter that would allow me to connect vehicle which uses 7 pin for brake buddy and a 4 pin that would allow me to use external trailer lights on roof. Because of wiring mod to use brake buddy, 4 pin in back of car at car hitch doesn't let external roof lights light up when motorhome brakes are applied.Is anything like this possible and is it for sale?

Hopkins make several part numbers 48470, 40955, or 40975Hopkins

Thanks enblethen.I looked these over and not quite what I had in mind. They dont look like they will fit directly into a 7 pin RV socket. I may be wrong but male side doesnt look likeit would sty in with RV lid holding down. If you are familiar with just "adapter", that has a rv style 7 pin and a 4 pin extension or feed off let me know. But thnks for quick repy

I needed a 7 prong plug to a 4 prong round. Could not find it, Only could find 7 to 4 flat, I cut off the 4 round and replaced it with a 7 prong male plug. Problem solved. Works great.

Many RV stores have it.. So do some auto departments and parts storesU-Haul Hitch World will have it.. IN STOCK at least every one I've seen, Some U-Haul stgores (NON Hitch World) will also have it.

Picked mine up at Northern Tool. 7-pin round to 4=pin flat

Trailer 7 pin to 7 and 4 pin adapter | Good Sam Community

enblethen
Nomad
Apr 21, 2017
Hikerdogs: You understand as I do. Changing the receptacle out to provide the 7 pin and a four flat.
Hikerdogs
Explorer
Apr 21, 2017
enblethen wrote:
I believe some are not understanding the OP's request.
What I understand, is he wants two feeds to the toad. One uses the seven pin connector and the second for a set of auxilary lights(magnetic or ?) on top of toad.

I'm not sure which posts you're referring to as to not understanding the OP's request. We installed a socket combination similar to the one I linked on our 2001 Winnebago Adventurer. The 7 pin socket powered the lights and electric brakes on our tow dolly. The 4 pin connector powered the magnetic brake/tail lights we put on the trunk of the car.
enblethen
Nomad
Apr 20, 2017
I believe some are not understanding the OP's request.
What I understand, is he wants two feeds to the toad. One uses the seven pin connector and the second for a set of auxilary lights(magnetic or ?) on top of toad.
Hikerdogs
Explorer
Apr 20, 2017
Here's a link to a 4 pole and 7 pole socket you can install.
https://www.etrailer.com/Wiring/Curt/C57674.html

The flat 4 pole socket connects the right brake light, right directional light, left brake light, left directional light, and running lights.

Here's a link to the standard trailer connector wiring diagrams.
https://www.etrailer.com/faq-wiring.aspx
crasster
Explorer II
Apr 20, 2017
Check Ebay too, they have a plethora of adapters. :)
enblethen
Nomad
Apr 20, 2017
I did not find any adapter that has the capability of using both the 7 pin RV and a flat four at the same time.
What I showed was a replacement receptacle that accomplishes it.
bob_nestor
Explorer III
Apr 20, 2017
Picked mine up at Northern Tool. 7-pin round to 4=pin flat
wa8yxm
Explorer III
Apr 20, 2017
Many RV stores have it.. So do some auto departments and parts stores

U-Haul Hitch World will have it.. IN STOCK at least every one I've seen, Some U-Haul stgores (NON Hitch World) will also have it.
Mooshaker
Explorer
Apr 20, 2017
I needed a 7 prong plug to a 4 prong round. Could not find it, Only could find 7 to 4 flat, I cut off the 4 round and replaced it with a 7 prong male plug. Problem solved. Works great.
casefarmri
Explorer
Apr 20, 2017
Thanks enblethen.
I looked these over and not quite what I had in mind. They dont look like they will fit directly into a 7 pin RV socket. I may be wrong but male side doesnt look likeit would sty in with RV lid holding down. If you are familiar with just "adapter", that has a rv style 7 pin and a 4 pin extension or feed off let me know.
But thnks for quick repy