Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Hello everyone! Radiator fan issue
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Old 01-28-2013, 01:06 PM   #14
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What I Drive: 2007 ZX3 5spd, 2012 SE Sedan Auto

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Originally Posted by Focuslu86 View Post
Thanks! So best thing i can do is take it to a shop and tell them to check my cooling system, radiator fans, etc! Can i check the relays before i take it? I mean i have the tools needed to test if its working or not, just wanna know if anybody can explain me how i can test this issues using a multimeter or a master probe test....
Based upon the symptoms you described, you have not yet destroyed the coolant system or engine so they don't need checked. You just need to get the fan circuit immediately repaired.

I'm an Electrical Engineer with plenty of troubleshooting experience, but I can't help much. This is because I can't work blind. I don't have a Focus 2001 wiring diagrams and Service Manual. Even if I did, I would still need to know precisely what car options you have to determine which wiring diagam applies. The other issue I have is engine control computer or ECU basically control the fan relays. This stuff is not covered by wiring diagrams. It takes some investigation, some sections in the service manual would describe that. This is why both pieces of factory literature are needed. What can be done with the wiring diagram alone is the relays, wiring, resistor pack (if equipped) and each fan can traced and tested for possible open ckt or grounding. In some cases, dual fan relays can actually be swapped to see if the problem moves but that only works on some cars with specific options.

If I were you, I'd be taking it to a dealer for this trouble while buying literature to have handy for future issues.
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