I have encountered problems lately regarding the fan where the fast speed setting does not work, first the fan module and then the radiator thermo switch. Now, I would like to completely bypass both, and run a live fused feed to a two setting switch in the dash, probably by taking the power from the rear window demistor as this is next to where I wanted to mount the switch, with two settings, slow and fast, where I can operate the fan manually when stuck in traffic etc. Is this possible? I have come to the understanding that maybe the fan module runs the auxillary water pump too? Is this cau