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k5esx

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Everything posted by k5esx

  1. Hello Flyinhy and others on this topic. About 3 years ago I worked on this subject and built a home brew electronic solution. It's still working. I invite you to read this pdf I wrote back then to a friend, Rick. Post back if you have any questions for me. MIkee Fan - MIkees FDCA Replacement.pdf
  2. Hi H. #38 wire has pulse width modulation of current, not voltage. I don't know voltage, my meter not good enuf. Suppose 12v is pulse voltage on wire #38: then suppose a 0.5 second on pulse, 12v. That is 50% power over a whole second, and that causes the solenoid to control the fan at 50% max rpm. Remember Monaco's pull down action? 12v @ 1 full second stops fan; 0 v @ 1 full second runs fan 100%. 0.3 sec. ON each full second yields 70% of full fan speed, and smooth action of fan at a continously adjustible speed based on engine temp. This is why the FDCA has two parts: the "brain" FDC that changes the pulse into variable voltage to the solenoid, and the solenoid itself, that switches the small tube fluid to the slide valve on the hydraulic fan motor. Simple! Eh?
  3. Hypox, there probably is a modulated thermostat out there, not sure. But problem of what is signal on ECM #38 wire? It's hard to pick a t'stat without knowing that.
  4. Hi Hypoxia, philcarrell, et. al., Last year I had to solve the problem of my cooling fan running 100% wide open all the time. (2006 Camelot 40PDQ, 400 ISL.) I studied what I could off the internet, and developed a solution. I'd like to share with this forum, and have attached a .pdf letter I wrote a while ago to a friend who asked about my solution. Feel free to contact me if you have any questions. So far this is working very well for me. Mikee, K5ESX Fan - MIkees FDCA Replacement.pdf
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