I have a 99' F150, 5.4, Tow package, 7 pin Harness, trailer brake box. I bought a new trailer that has 7 pin wiring, with electric brakes. When i plug up to the trailer, everything works but the running light. I even went through and re-wired the trailer for fear of bad wire. Still, no running lights. SO now at night i have to run down the road with the flashers on. Does anyone know what is wrong? I really dont like the flasher look! Thanks for your help

 

Check the small fuse box under your hood on the driver's side. It's also detailed in your Owner's Manual.