On the road running light help...

[livinlightly]

Greetings from a rest area outside Billings, Mt!

I noticed a few miles ago that my running lights were no longer on so I pulled off at a tray area to check it out. Not sure what to look for..

This morning when I left Idaho the lights were screwy and I found that the ground screw head had broke. Added a new screw and everything worked fine.

The ground that was the problem this morning looks good and the trailer brakes work...just no lights.

I need some direction as to what/how I should trouble shoot this... Curious if the ground at the rear of the trailer would affect this (the one coming off the wiring pigtail is connected).

Any direction would be appreciated! I am "resting" until I can get this squared away.