Right, now I have my foglight grills in!!

I want to use the foglight switch as a fan over ride facility to switch my fans on in traffic. Now as I have two fans, can I just make up a loom to go from the foglight connection to each fan across the + and - , or is that a pants idea. I know the usual way is just to bridge the fan switch, but it would be easier using the existing foglight wiring!!
Any help greatly appreciated!!