mttls400 Posted March 29, 2008 Share Posted March 29, 2008 hi .. im new to this website. i was wondering if these 1992 LS400 electronic fans connect to A/C evaporator electronic circuitry (under the deck - by the passenger side)? The reason i am asking because my car just got an evaporator replacement by the shop and i noticed that the electric cooling fans are no longer work when A/C is operating. Should they be when the A/C is turned on? If i remember correctly these fans should have low RPM whenever A/C was on in the past. I did 1/2 hour driving test this evening with the A/C full on and the fans is not moving at all. Please, help - i am just afraid the mechanic, who has worked on my car, did not installed the evaporator correctly. I also test it by keeping the car on while it was on park and turn the ac to full and kept about for 1/2 hours then pop the hood and saw its still not working. Please, help - Thank you all ! Quote Link to comment Share on other sites More sharing options...
LScott400 Posted March 30, 2008 Share Posted March 30, 2008 I don't find anything in the service manual that suggests that the evaporator is monitored for cooling fan operation. There is a coolant temperature switch in the radiator that affects fan operation. I would check the relay first, then the ECT switch. The following portion of the manual has a wiring diagram and pages 16-18 have the procedure for removing and testing the ECT switch. Hope this helps! electriccoolingfan.pdf Quote Link to comment Share on other sites More sharing options...
mttls400 Posted March 31, 2008 Author Share Posted March 31, 2008 I don't find anything in the service manual that suggests that the evaporator is monitored for cooling fan operation. There is a coolant temperature switch in the radiator that affects fan operation. I would check the relay first, then the ECT switch.The following portion of the manual has a wiring diagram and pages 16-18 have the procedure for removing and testing the ECT switch. Hope this helps! electriccoolingfan.pdf Thank you Scott. This PDF helps me a lots Quote Link to comment Share on other sites More sharing options...
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