View Equipment on Preventative Maintenance Route


I have set up various preventative maintenance routes inclusive of multiple pieces of equipment. How do I quickly check what route a piece of equipment is associated with?
We don't currently use routes, but my understanding of routes thus far would lead me to believe that "PM Backlog" would and should still display based on unit #, the last time a PM was performed, whether independently on its own PM or part of a PM route. No?