greg1647545532 Posted July 7, 2015 Report Share Posted July 7, 2015 I'm on vacation and I'm on my 3rd cooling fan/AC relay. Need to drive back through NYC/Jersey, it's gonna overheat if the relay pops again. I'm assuming one of the fans is drawing too much current? Is there an easy way to tell which one? I don't have a multimeter but I could buy one in a pinch; no clue how to test current draw without splicing into wires. New fan motors are about $200 a pop from Kia, $400 if I replace them both. I may be able to find a local junkyard. I suppose there's the nuclear option of driving both fans off the battery, but, uhh... I hope it doesn't come to that. Quote Link to comment Share on other sites More sharing options...
greg1647545532 Posted July 7, 2015 Author Report Share Posted July 7, 2015 About $100 for both fans from local junkyards, so that's not too bad if that's the way I need to go. Quote Link to comment Share on other sites More sharing options...
greg1647545532 Posted July 7, 2015 Author Report Share Posted July 7, 2015 Part of the problem may be that the OEM relay is 50A and the only parts store plug and play replacement I could find was 40A. But I'm still assuming something is over drawing the circuit. Quote Link to comment Share on other sites More sharing options...
cstmg8 Posted July 7, 2015 Report Share Posted July 7, 2015 Have you been able to look up/determine what all is run on that relay? what does the AC part run? Quote Link to comment Share on other sites More sharing options...
greg1647545532 Posted July 7, 2015 Author Report Share Posted July 7, 2015 Nearest I can tell the relay feeds into a fan control module that drives both fans, and that's it. There's not a lot out there for Sedonas so it's hard to troubleshoot, took me a while to even find the relay. Quote Link to comment Share on other sites More sharing options...
ecc_33 Posted July 7, 2015 Report Share Posted July 7, 2015 you need to look at a wiring diagram and see what goes through that relay. If by chance the a/c compressor goes through it could be a bad compressor clutch putting a bunch of amp draw on the relay. Quote Link to comment Share on other sites More sharing options...
acklac7 Posted July 7, 2015 Report Share Posted July 7, 2015 Check the relay ground, the fan ground and the module ground. Throwing parts at Electrical issues typically isn't the wisest course of action. Quote Link to comment Share on other sites More sharing options...
greg1647545532 Posted July 8, 2015 Author Report Share Posted July 8, 2015 Thanks for the tips, guys. Here's the wiring diagram I found: http://ww2.justanswer.com/uploads/EB/ebrock63/2013-01-13_185242_2013-01-13_115144.png The relay is controlled by the ECU and feeds into the fan control module, which only drives the 2 fans according to that. The A/C compressor has its own relay in the fuse box. The ground wire from the relay goes back into a harness and I can't visually trace it, and the grounds from the fans go back into the control module and I have the same problem. I basically have a couple hours tomorrow to try something in order to make the drive home more pleasant with a small kit of hand tools and whatever I can find at O'dvancazone or car-part.com. Quote Link to comment Share on other sites More sharing options...
acklac7 Posted July 8, 2015 Report Share Posted July 8, 2015 This is why I buy a Factory Service Manual the same day I purchase a car. At any rate, given your predicament I would hardwire the fans to the battery. It could be any number of issues. Buddy had similar issues with his Hyundai and it turned out to be the coolant temp sensor. Quote Link to comment Share on other sites More sharing options...
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