Interior fans for Norcold fridge

I have installed them on 2 different refers. I purchased them on ebay, just google norcold refer fans. There are 2 ways to wire them up, if your door switch provides a ground for the light then there is 12 v power to the light all the time, you can connect into this power wire. The ground for the fans is through the condensing fins. If the door switch provides 12v to the bulb and you wire as previously mentioned the fan will only come on when the door is open. (don't ask me how I know). In this situation I pushed a small 18 ga. wire down through the drain tube and connected it to the wire going from the circuit board the the door switch. The fans did seem to help on both occasions. The fans I purchased came 2 computer pancake fans mounted to aluminum with guards covering the fan blades with an alligator to mount to the cooling fins. Hope this helps;kdk