Trailer plug wiring diagram | SteelSoldiers No one seems to make an adapter from the military plug to a civi plug. And I've been through the training manuals several times and have had no luck with indentifying the wiring for the trailer plug so I can make an adapter from a old military trailer harness. Wireing a M101A2 military trailer for civilian use - YouTube Click to view on Bing8:10This is a video about how to convert an M101A1, A2, or A3 trailer from the large 9 pin NATO plug to a standard 4 or 7 pin civilian plug. Make sure you check out the link to the wiring schematic as despite searching I could not Author: NelsonStudiosViews: 32K Trailer Wiring M101A2 - YouTube Click to view on Bing3:36How to convert your M101A2 military trailer from a the 12 pin to a standard civilian 4 pin. Purists need not apply. I wanted to be able to retain the original heavy duty tail lights but I really did not want to mess with the military Author: oldskool1964Views: 7 Modifying the M1102 trailer wiring for civilian use Most people don’t have and don’t need a military HMWWV to have fun or tow a nice military light trailer such as the M1101 or M1102. The good news is, you have the option to choose a 4 or 7 pin connection that will match up perfectly with your SUV or truck wiring.