Today I was out for the shake down cruise in the newly finished roadster pickup, and when I got home the 30 Amp fuse that supplies power to my "wrecking yard" Pontiac Fiero fan was blown. I replaced the fuse, and the fan seemed to work all right, and the fuse didn't blow after a couple of minutes of running. My question is, how can I check the current draw, to see if there is an internal "bind" in the fan that makes it draw too much current, thus blowing the fuse.----Also, how do I know if a 30 Amp fuse is sufficient. I used a Ron Francis "basic" fuse panel that has a built in grounding relay for the fan, and it recomends a 30 Amp fuse, but is that really big enough. I am sure that there has to be some logical, scientific method, using an Ohm Meter or something to get an answer. I don't want to blindly go to a bigger fuse and burn up the car. The only 2 glitches that I actually experienced were the fuse blowing, and for some reason my electric speedometer seems to not be working. Other than that, everything seems to work as it should.