Diver Side Marker Lights Not Working 2021 317rlok

[n ferris]

On my pre-trip this am all the driver side lights weren't on. All taillights and rear Marker lights were on with along with the passenger side marker lights. Trailer Brakes work along with the charging system. The all light working on the way there less than 3 days ago. Any thoughts?

[bucko]

My guess is a common ground that feeds the lights on that side.

Or, it's possible that a fuse is blown, but I'd think all side lights are fed by a fuse.