![]() Check the rear of the trailer connector, and make sure the factory pigtail is firmly plugged into the rear of. Your owners manual should show the fuse locations. Good luck but I'd suspect the plug on your trailer has some corroded surfaces. If the 7-way is not functioning, check the fuse box under the hood and make sure the relays that activate the tow package and the fuses that protect the towing circuits are in place. What's funny is dielectric grease is non conducting, but we use it for electrical connections because it protects the surfaces of the contacts from corrosion, not to make them actually conduct better, seems counter intuitive but if you have good clean connections, it wipes the grease off enough to make a good and effective electrical contact. The dielectric grease will help if they are already clean but once they get corroded, they will need to be properly cleaned first, then apply the dielectric grease. ![]() The ones on the truck are more protected from corrosion but are not immune. If it's stubborn, I'll take a pocket knife and scrape the thin layer of oxidation off the female spade connections in the trailer connector, not real easy to access. I usually plug and unplug several times to wipe the electrical contact surfaces and my problem usually clears up. The terminals are most likely brass and they tarnish from the elements. Mine turned out to be slightly corroded terminals on the trailer harness plug since it is exposed to the elements. I had a similar issue on my conventional trailers when I connected their 7-pin plugs to my 2017 F350, same type connection just out by bumper instead in bed. Anyone else have this issue when using the 7 pin on their 2022 superduty, or know of a fix? They keep blaming the trailer, but I never had this issue until I got the new truck. It seems that this is connected to the recall, but it doesn't seem that anyone at the dealer knows what to do. ![]() When I get the fault, I don't have brakes on the trailer anymore, however, all my lights and blinkers still work. I have found that other people will get a blinker issue that seems similar. In this video you learn to test them with a test light. I have checked the trailer wire to make sure it is well seated. 1.3K 312K views 11 years ago The seven pin trailer plugs on travel trailers and RV's are problematic. However, I still get an error that will pop up on my dash that says Trailer Wire Fault and will say my trailer is disconnected, when it is still connected. There is a recall on the trailer brake controller that my dealer fixed. I have a 2022 F350 Superduty Platinum 6.7L PSD that I use to pull my 5th wheel. ![]()
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