[CJ428CJ]

Goopie 18,

Having the fan wired backwards so it blows the wrong way could certainly cause the fuse to blow while driving at speed. Motors have a huge in-rush current. Depending upon the motor it can be up to 6 times the normal full load current. While driving at speed, the motor is trying to turn one direction while the air rushing across the fan blades would be trying to turn it the opposite direction. That's going to significantly increase the current that the motor draws as it fights to try and turn the "right" direction. The result will be significantly higher current draw until the fuse blows.

Chris