SPST switch to car battery

I bought a 12vdc 30a spst switch. I'm wanting to hook it up to my car battery and use it to turn my radiator fan on and off. Do I need something in between the switch and battery? Thanks for your help

demonic_crow:
I bought a 12vdc 30a spst switch. I'm wanting to hook it up to my car battery and use it to turn my radiator fan on and off. Do I need something in between the switch and battery? Thanks for your help

A fuse would be a very good idea.

Not sure what current your fan motor draws but automotive parts stores stock these kind of fuses and inline wired socket holders.

http://www.allelectronics.com/make-a-store/item/FHP-25/WEATHERPROOF-ATC-BLADE-FUSE-HOLDER//1.html

Lefty

So do I need to use the relay and the fuse thats under the hood. They both still work. I believe it was a 30a fuse but could be 10a. I'm hoping the fuse would be all I need, what you think? Thanks alot for your help.

P.S. I also believe I have to get a 16g wire or bigger, sound right?

Thats the switch I have.