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Trucks, Trailers and Hauling for Shows The ins and outs of setting up a show trailer and getting it to and from the engine show. Please be fully aware of our web site Terms of Use Disclaimer as you read. Safety first!

Trucks, Trailers and Hauling for Shows

Trailer plug?

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Old 11-17-2012, 07:50:03 PM
Tom Nowak Tom Nowak is offline
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Default Trailer plug?

I just got a used toy hauler camper, which has the 7 pin camper stype plug( going to haul some engines around to shows with it and camp All my trucks are wired for the 6 pin plug like on stock trailers. I got an adapter to go from 6 to 7. What I would like to know what is the big center post on the camper plug for? Is it used as a hot wire for say charging the camper battery from the truck? The adapter makes all the lights and turn signals work. On my other trailers I got the ground through the hitch, is one of the extra pins on the camper plug for the ground? These are all the round plugs ,the one on my trucks are just smaller. I tried looking it up but could not find out for sure what the center pin was for. I took a test light and a battery and and could tell what most of the pins were for. One side pin when I tested it with a battery seemed like a dead short is that a pin for the ground?
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