Blower motor issue

[rhamer88]

I’ve got a 1984 C10 and over the weekend my heater blower stopped working. I’ve been chasing wires a trying to see what happened and I discovered that the fuse for the blower is grounded. It didn’t pop or anything, but when I hook up my test light to it, as in the alligator clip side to a positive lead and the probe end on the fuse, it’s grounded. Is that correct? Doesn’t seem right.

If not, anyone have any idea why or how that happened and what I can do to fix it? Let me know if any further information is needed. Thanks in advance!