When I hook my camper up to the truck & turn the trailer mode on I get power to the trailer lights but when I try to pull the camper the trailer breaks are engaged. I had a friend hook up his truck and he could pull the camper no problem so I’m sure it’s an issue with my F150. I’ve checked associated fuses and they looked fine. I tried swapping out the trailer tow hitch wire harness socket plug but that didn’t work either. I’m at a loss. Anyone had this problem before?

 

Try reposting to the Towing Hauling forum sub section, but include your model and year. You'll get a more towing focused response there.