help with non-working trailer lights

[Fisch_NBT]

My trailer running lights will work five minutes after driving, then start to flicker and shut off completely. My brake and turn signals still work but no running lights.

I have no idea where to begin since I have already changed every 20 amp fuse in the '09 truck.

The trailor is a 2006 Stratos single axle.....

any ideas or input would help a great deal preventing bigtime tickets.

[Chasman]

I just went through this with my trailor. You have a bare wire. You also have some blown fuses.? I had two blown fuses. I have a Chevy. One was a 10 amp and the other was a 15 amp. One was the back light for the trailor and I can't remember what the other fuse was. I did find where the wire rubbed against the trailor. Check where your wires come out to your side markers, then work your way back to your tail lights. I just use chaulk around the hole the wire runs through. Tape the wire or splice it. My wire wasn't broke so, I taped it real good.