[ Ссылка ] Testing 7 pin plug on a travel trailer the easy way. The seven pin plugs are often problematic, but here's an easy way to test the trailer end of the plug.
![](https://i.ytimg.com/vi/G-VYf5MltgI/maxresdefault.jpg)
[ Ссылка ] Testing 7 pin plug on a travel trailer the easy way. The seven pin plugs are often problematic, but here's an easy way to test the trailer end of the plug.