Popping fuses and melting wires

[broncosbybart]

If you have the power for the fan going to the fuse block, that is probably a big part of the problem. As a rule of thumb, you want to keep the wires as short in length as possible. I'd do exactly as Wickedlester suggests with the relay and wiring and mount the relay right up front near the battery and fan. That way you only have a few feet of wire to the relay and then fan. Hope that eliminates all your problems.

Or, just put a mechanical fan on it