I'm thinking how its hooked up it has a wire that runs from the switch to the fan relay and this gives it the ground its looking for. Nothing is hooked to the thermoswitch and its actually gone and a plug replaced it.
Ok looked again that's it the factory wire to the switch is tied to the wire running to the black wire on the eco power switch and the green with red stripe goes down to a bolt under the console. Push the button connects the wire relay trips and you get a full 12 volt power to the fan and bypasses the resistor. sh*t I still got it, just can't remember what it is . /ubbthreads/images/graemlins/grin.gif