I have been haveing real cooling problems with my new (to me) 406 in fact it losses water like a tap ,I have had a sniffer test done and no colour change .so fingers crossed .I am at the mo stripping her down to fit all new belts and pulleys as no idea when these where done .I have removed header tank which is really badly stained with rusty water in and out side ..I have also removed rad for cleaning and testing ..what I would like to know is does any one know which wires I need to run power to to test fan opperation . will test switshes as mater of course when rebuilding but want to check fan opperation whilst accesable ..any help gratly appreciated.thanks