My son bought this car last summer the cooling system was in real bad shape. I used permatex cooling system flush and flushed it 2 times also replaced 2 frost plugs that were bad also repaced the block drain plugs with t handle drain plugs to make it easy for working on cooling system. The problem that I am having is the coolpng fan will not kick in when the block reaches temp. to turn on fan but if the a/c is on the fan runs with the a/c compressor. I have tried unpluging the coolant temp sensor to get the fan to turn on but nothing happens. I have also checked the fuses and relay and they seem fine. I have found a TSB on alldata #61-65-64 Cooling Fan-Revised Elec. Circuit Diagram. and still nothing. If you have any information on this I sure would be greatful. OK I just spent 2 hours going through test checking out the elec. and have determind that the problem is somewere between the coolant temp sensor plug and the coolant fan relay. I have constant power at the relay and ing on power. when the relay is out I can manually jump it and get the fan to run. looking at the wiring dia. it shows coolant temp sending unit for the gauge with a single DK green wire and a coolant temp sensor with a yellow wire and a black wire. This sensor I can't find anywhere or the motor. if you have any input I sure could use it. Thanks Bob M.
Jan 19, 2008 at 1:59 PM