1999 jeep cherokee electric fan does not come on Ive replaced the fan relay,a/c relay and coolant temp. sensor (the sensor -twice-ya never know ya could get a bad one) temp. gauge in dash does work, when jeep is running and I unplug the coolant temp. sensor, the fan will come on and stay on untill I plug the sensor back in ---Ive also cleaned the ground wires that I could see .Have you seen this problem? I would be glad to make a donation if you have seen this besides getting a schematic and tracing all the wires Thank you.