Post by
mity2 »
https://forums.nicoclub.com/mity2-u168622.html
Tue Sep 21, 2010 6:19 am
usualy when fuse melts, rather then meaning that your running high enough current through it, but not high enough to pop the fuse.
Fuse is heat sensitive, and its not super accurate.
For instance, 30amp fuse will blow right away, if you run 40amp current through it, because it heats element up right away.
If you run 20amp through it, it'll be fine, because it won't get hot enough.
But if you run, say 28amp continuesly, it'll heat up element enough to cause dmg(melting), but not hot enough to pop the fuse right away.
Samething goes if your right at 30amp or just above it. wont pop the fuse, but slowly heats it for the fuse element to melt from heat eventualy.
Or at least this was how it explained to me by installer back when I had the identical probrem with my old Mustang, and it was kept melting 40amp inline fuse.
Replaced 40amp blade fuse with 60amp glass tube fuse, probrem went away completely.