2007 T600 turn signal issue

Howdy folks!

Sometimes the turn signals all work fine. However, other times, only the right side on the back of the tractor will blink normally. The rest only every third or fourth blink.

There is a single flasher relay in the fuse panel. But I can't see how it could be acting up and still have the one light working correctly.

I can say the same for the turn signal switch (stalk). If it were bad, why would one light not be affected?

Any help/ideas are appreciated!

EDIT: This issue persists with or without a trailer attached. And affects both turn signals on the trailer when attached.

 

Wondering if it might be the light control module. Knowing how my luck runs, and the price of that module, that's probably the issue.