the fuse is probably already there but that's an easy check. remove the glove box and on the back there's the legend for the fuse box. Check which position it should be in and if it's not there simply plug in the correct fuse.
I think it's probably there because a similar thing happened when I installed the fog lights. The wiring was already there so I just had to plug in the foglights and replace the switch on the dash to support the fogs. The fuse was already there so all was plain easy. Have a look and keep us posted