I have a few things I tow, and a few different vehicles to tow them with. Rather than mess with the factory wiring, I made my own everything adapter. One one side I have a seven flat pin RV, a six round, and a four flat connector, all female. On the other end I put a seven flat pin RV, and a six round, all male. Now I can tow my horse trailer, which has a seven blade with both my Silverado pickup and my RV, and I can also to my explorer with both of the above vehicles. I can now also tow my horse trailer, explorer, utility trailer and wire up the set of magnetic lights, all with one adapter. Would have cost me at least $75.00 to buy all those adapters, and about $50.00 to change out all the plugs on my vehicles / trailers to the largest type plug. This cost me about $10.00 because I had most of it at home.
My towing hookups;
RV - six pin round connector
Pickup - seven flat pin round connector
Explorer - seven flat pin round connector
Horse trailer - Seven flat pin round connector
Explorer as towed vehicle - six pin round connector
Utility trailer - four flat connector
Magnetic lights - four flat connector
My towing hookups;
RV - six pin round connector
Pickup - seven flat pin round connector
Explorer - seven flat pin round connector
Horse trailer - Seven flat pin round connector
Explorer as towed vehicle - six pin round connector
Utility trailer - four flat connector
Magnetic lights - four flat connector