IS the only way to blow the main fuse to hook the battery up backwards?

 

Gosh no. Put a new fuse in. Then get a screwdriver out. Now find the large output terminal on the alternator. Now touch it with part of the screwdriver and another part of the screwdriver with the intercooler/rotor housing/ alternator body/you name it.

Now that you've done that, I hope you have another fuse to replace the one you just blew.

 

i hooked up battery the wrong way once now my tach dont work