2021 International LT625 Left Turn Signal

My lonestar has the same tail lights as an LT. When mine did the same thing it was a rubbed wire. i would check the wire is live with a tester and if not check further up. Mine was rubbed through at a ziptie and so caked with dirt that i had to cut the ties and rub the dirt off to find it. Snip the wire and use a shrinky dink on it and it should be fine after.

 

As a quick test, you can plug the left side wiring into the right side light to see if you have a light or wiring problem.

There are no fuses for those. That is a body computer powered circuit. If the computer senses a short it will kill the circuit until you cycle the key.

 

No problem and glad that helped. I know it took me like 6 hours to track down. So dont feel bad on your end.