FAL-220 fans blowing fuse

[LA_phantom_240]

Here's the situation... I'm running a DIF dual fan controller on my Flex-A-Lite FAL-220 fans. I can't remember the amp draw of the fans (and can hardly find it now cause they're discontinued ), but if I recall, it's something like 12.5 amps per fan. The DIF fan controller comes with a fused link and a 30a fuse. Well, the fans and controller worked just dandy up until a couple of weeks ago when the fuse blew. I didn't see anything wrong, other than the link had melted a bit. I replaced the fuse and went about my business. Well, today I get to work and I don't hear my fans when I get out of the car... cause the fuse blew again. I don't see any shorts or anything of the sort, though the wire from the link to the controller is a bit blistered from getting hot, and the spade terminal that connects the link to the controller is a bit blistered as well. The only thing I can think of is that the spade terminal has a weak connection and is getting hot.

I dunno.

What should I look for?