running lights stopped working

[powerstrokinturbo]

Heres the story i plugged in my trailer the other day and that night i went to take it home. I turned my lights on and no running lights and no dash lights. I checked all fuses interior and under the hood. I moved all of my relays around to check those. I tried another light switch. When i jump the switch at the switch plug the running lights work. I am stumpped and need some help. Thanks for your time.

[rajharley]

sounds like you need to try swapping the switch for a new one.

[StarDriver]

I'd replace the switch and also check your trailer for a short that may be overloading the circuit. I'd put a fuse in the line from the trailer to the truck.

[powerstrokinturbo]

I replaced the switch for the second time. The running lights still will not work unless i bypass the switch and jump a hot to the running lights wires of the wireing harness. People say there may be a short in the ground. Where do i even Start? where do i go from here?

[fordnut85]

remove the trailer lights and try again if the lights work then you need to look at the trailer if they still don't work try again.

[powerstrokinturbo]

the Trailer hasnt been hooked up since this happened. the trailer harness is a direct connect that goes in behind rear bumper. I have removed that and it still doesnt work.

[Diesel Freak]

You may have a bad ground somewhere

[powerstrokinturbo]

I checked the power to the switch and it had none. It was like a fuse was blown but none are. So i ran a direct line from the sylanoid with an inline fuse to the switch and now everything works like it is suppose to. Thanks guys for your help.