pumpmck

I have been having this problem on a 2014 Chevy Silverado that I just got. My problem looks like it was the brake signal shorting to the frame at several of the jumper connectors near each wheel on the trailer. I also spread the trucks connector pin inside the trucks 7-pin receptacle. If you look closely at the connector pin you will see that it is a U-shaped pin and you can use a small blade screwdriver to spread the pin so it makes better contact with the trailers plug pins. Also, the top 2 pins are the brake signal and ground. The top left one looking at the receptacle is the brake signal and top right one is the ground. Several notes talk about bending these pins toward the outside of the plug, but I don't really think that will do much. The receptacle pin slips inside the trailers pin opening and over time the U-shaped pin isn't making a good contact as it has lost its tension. I found a pdf file that says that the truck is looking at the trailer brake line to determine whether a trailer is connected to the truck. I don't think the brake and tail lites are even checked. My truck has both 7 pin and 4pin receptacles and 7pin is on top.