Re: electric fan blowing fuses
Sounds like a bad ground. I had a 55 Chevy that always blew the fuses for the dash lights. As it turned out, the paint I applied to the dash was Imron (old style poly) I thought I had grounded the cluster well, but I was wrong. I'd try taking the area for the ground down to the metal.If there is paint or slag in the way at all, it could be enough to mess up the ground,causing the fuses to blow. An electric fan draws a fair amount of amps. The fact that you are using relays should have addressed it. The ground also has to be up to the task. Fuses blow because of too much resistance somewhere in the circuit. I've found that at least 80% of electrical problems on Chevies are as a result of poor grounds. Give it a whirl....might be what the doctor ordered. If its not the ground, the fan is probably bad as you said.