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Reference post 15: civilian 12 volt trailers typically have a 2 post socket for the 1156 bulb that does the brake light or turn signal and as a running or tail light. The 24 volt bulbs used by the military hare are single post bulbs and the indexing pins will not match a 2 pin socket. The...

Reference post 14: guess again. Military lights do not have any two pole sockets like a commercial trailer unless you have a M 872 or something that has dual 12/24volt capabilities. The military trailer line has no brake light circuit: the brake lights are actuated through the turn signal...

Memphis Equipment sells a converter to go from 24 military plug to 7 pin 12v commercial plug if you want to do both civilian and military trailers but it not real cheap. Check with them on price. In service we used to interchange trailers between M818s and commercial tractors. If you were trying...