No running lights 2014 T660

I have a 2014 T660, had some def system work done at KW and doubt this is related
But I had the truck washed and that night the running lights wouldn't work, brakes, blinkers, flashers and cab lights worked. No running lights on truck or trailer

Unplugged the trailer, nothing then I disconnected some extra light wires I had installed thinking it could have been something there and called it a night

Next day I retired a few lights I thought may have been getting bad and a few other things, turned on lights and they worked so I figured I found the issue

Ended up in a rain storm 2 days later and again lights quit, this time cant get them on, no fuses blown and have disconnected wires and harnesses to do the process of illumination thing

dropped it off at a shop and they cant find it either, last resort they are going to try a few main harnesses and then tear in to the fuse box as one of the fuses looked like it had gotten wet

Just wondering if anyone may have had this issue and know of a solution other than what we are doing

 

Had it in my local shop yesterday, he could not find the issue so I brought it to KW today and they're still looking