I have a random unlabeled switch on my dash.

There is no label, it's after market, and it has two positions. There is an indicator light on the switch itself and in the on position it lights up (so I know it's getting power and turning *something on). I tried to follow the leads. One is ground and one almost seems like it's connected to the blower (but this might just be where it's drawing power from). I've tried Googling these numbers on the back to no luck… the words say "Job Lineset". Any ideas on what this switch may do? It doesn't seem to do anything that I can tell..for context 1996 International 9400i Eagle with N14 Celect+.