extra switch for rad fan ??

[r5ben]

im trying to wire my rad fans to a extra switch insid ethe car so i can put it on as and when i like :roll: i mostly want to do this after a hard drive etc so i can get some of the extra heat out b4 putting it away i did this on a old turbo car i had and it did the job well so id like to do this again

my fan does work on its own and comes in as it should but id like to switch it as well
any one know how i can do this and what wires to link into for the best way ???

i was going to go from the battery to the switch and from the switch to the rad fan wires but dont know what way round to put them as there not red or black etc

any help plz and sorry for the long post :roll:

 

[geetee]

probably better of using a relay so you aren't carrying the full power draw through the switch.

Cheers
GeeTee