It also makes the fan stay on until a cooler temp is reached to turn it off. So once it is on it usually stays on. That is the main reason that I stopped using the resistor. It just sucks so much electricity, almost like you would want to use a larger amp alternator so the rest of your power requirements are met.

You can try it just by wrapping the resistor ends around the contacts, no need for soldering until you run it for a while and like it.