Cool, you found the fuse!
If it worked before and blew when you put a new plug on it, good news is you may have shorted something in the plug (stripped a wire too long or something). If it keeps blowing the fuse, you'll need to trace down the short.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5โ turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold