my 1995 saturn sl cooling fan does not turn on unless i run a/c.i have replaced thermastat and water pump and checked relays and fuses. WHAT NEXT?
You most likely have a bad water temp sensor (or bad connection to the sensor).
how hot is it getting w/o your ac on and no rad fan on?
Can u give me a detailed location of engine coolant temp sensor,PLEASE!
It gets so HOT it boils over!
Back track the wires from the fan plug. One will go to the ac switch, and one goes to the temp sensor. Usually the water temp sensor is located on the radiator or thermostat housing.
You may even want to think about changing your radiator cap. The car could boil over and never get hot enough to trip the fan switch if the cap is faulty.
http://www.google.com/imgres?um=1&hl=en&sa=N&biw=1600&bih=738&tbm=isch&tbnid=rJ77QDYPVdk1CM:&imgrefurl=http://www.saturnfans.com/photos/showphoto.php/photo/52117/title/ects-location28closer-29/cat/500&docid=UhFZAPrmTTC9xM&imgurl=http://www.saturnfans.com/photos/data/500/ECTS_location_2.jpg&w=720&h=540&ei=P_n4T-KRCKHq2QWGpc3wBg&zoom=1&iact=hc&vpx=168&vpy=273&dur=509&hovh=194&hovw=259&tx=124&ty=111&sig=101853270542787326595&page=1&tbnh=119&tbnw=159&start=0&ndsp=33&ved=1t:429,r:8,s:0,i:101 and i agree on checking to see if theres steam escaping from the cap, since the system needs to be pressurized.
heres the pic from that failed link
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