I guess its a possibility, though unlikely. You can always move trailer wires around to match your truck. The Round 7 pin RV plug wiring locations is pretty universal. I think you said you already took a volt meter to check the truck, well, I'd check again and write down the outcome of each pin location. (i.e. left pin = left turn, right pin= right turn, etc.) Check this against the corresponding trailer wiring diagram and see if you notice a problem.

You could also find another trailer to hook the truck to and see if it has the same problem. Or if one of your friends has a truck with the same connector, hook it to your trailer and see if the problem still exists.

Good luck. I hate electrical gremlins.

ok so we are still having problems. We hooked another ram 2500 up to the trailer and every light worked perfectly which rules out the trailer or the trailer wiring. My dad replaced the plug on his truck with an OEM chrysler one and hooked it to the trailer and he has turn signals, but when he hits the brake all the lights on the trailer light up and he has no running lights. He also hooked his truck up to another trailer and it showed the same symptoms. The problem is in the truck somewhere.

??????????????????????  How about the wiring TO the plug????????????????????????

I don't recall if you stated what year your Dodge truck was but do a google search and see what you come up with. Some of the Dodge trucks had a design problem where the turn signals on the left side would flash when you moved the turn signal lever to indicate a right turn. I believe there was a TSB on this problem. And I don't remember if it was in the signal flasher, the turn signal switch, or the chassis computer.

Good Luck, Paul

Then take a test light and check the "truck" plug. Be sure each terminal is reading correctly....  7 way is about middle of the page....  http://www.horsetrailerworld.com/home/wiring.asp