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Old 10-16-2019, 01:26 AM   #51
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I had worked out a setup that kicked one fan on and then 2-3 seconds later the other one but never had to go there as I did something different to fix the issue. There is a timer delay relay made to do things like that, you can find them on the web.
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Old 10-16-2019, 01:03 PM   #52
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Quote:
Originally Posted by zacautomotive View Post
Quote:
Originally Posted by amc49 View Post
It's likely a combination of both fan motor and engine age. The fan amp requirement goes up on older electric motors when the winding resistance goes up. The engines as well lose idle rollover torque due to ring and valve wear that lowers compression, the engine does not have as much 'uumph' at idle as it did new, that quality allowed the engine to power right through a power hit that temporarily lowers idle just for a fractional second.

Get the battery tested at a parts store for free, if it passes the loadtest at proper CCA (about 500 as a minimum) then it is NOT the battery. You can change battery all day long and not touch that issue at all, it has nothing to do with the battery.
In a previous post he posted his battery is only at 12.2 volts which represents a 60% charge capacity.
He complained of dimming headlights when the fan turns on.
I don't believe the battery will fix it, but probably should be replaced due to not being able to hold a full charge.



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If true you may well be right, I consider a 12.2 if the battery already charged as a bad one, good from 12.8-12.3.

Could be an alternator issue as well.

My 'nothing to do do with the battery' quip was based on one being sound and known good.
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I believe he was getting 14.7 with the car running no accessories.
13.8 with the fan running. 12.2 with car turned off.

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When I did battery and alt checking for the big O there for a while, I came to the conclusion that a battery will show issues if it gets around 12.2 volts even if charging correctly, and why I commonly spit that number out as one that is not good on any car. It is one I saw lots of issues on, I consider them pretty much toast then.
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I had worked out a setup that kicked one fan on and then 2-3 seconds later the other one but never had to go there as I did something different to fix the issue. There is a timer delay relay made to do things like that, you can find them on the web.
replaced my fan and it fixed everything as I suspected but last night the fan never kicked on when it should have so it started to overheat so i shut her down got a tow and it's at the shop, i was there this morning the fans were kicking on in the shop like that should of at temp 226 and bring it back down to 210. The question as to why i didnt turn on last night at idle when it should have I'm stumped. Ford doesnt make the fan relays anymore either
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Old 10-16-2019, 01:07 PM   #53
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My resistor was cracked all the way around it but now I'm not taking the car back from the shop until the reason as to why the fan didnt kick on last night but is kicking on now is figured out. Its hooked up to a tech 2 scanner and iv watch the hest rise and drop in a consistent pattern with this new fan but I fear once the scanners no longer on it itll stop turning on as it should.
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Old 10-16-2019, 01:10 PM   #54
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I know it's going to sound insane but I'm wondering if its acting correctly because its warm in the shop and cold outside so theres miscommunication between the fan and engine
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Old 10-16-2019, 08:33 PM   #55
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So it's working just fine now, not to sure what happened but it overheated last night and now is working now problem at all
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Old 10-17-2019, 04:23 AM   #56
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When they do it once it's likely it happens again. Change the correct fan relay, a cheap way to get around that a lot. You don't need a Ford part to get 100% reliability there. Change the resistor too if cracked or melted. I bolt mine up with small screws, the OEM plug-in there is crap even new and can let the fan not come on when it has been failed once. The connection there is one of the worst in the entire car.

The fan relay socket cannot be melted or deformed from heat either, more asking for trouble.
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Old 10-17-2019, 08:24 PM   #57
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Theres a new fan on it, that's the one that didnt kick on but it's been 2 days and it's working just fine checked relays they're fine checked plug in (mechanic did that they're fine) I'm probably gonna replace the high an low relay. That's the only relays for the car fan I think
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Old 10-17-2019, 08:32 PM   #58
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Connection hooks up fine, I'm wondering if my mechanic just didnt plug up something the right way because it's odd it didnt work one night but worked for 5 consecutive hours while he monitored the heat from the motor. The heat would get to 226 and fan would kick on and drop to 210 as it should be
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Old 10-17-2019, 11:43 PM   #59
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Relays can do that all day long, 1 time out of 50, 1 time out of a hundred, it makes no difference. You can't 'check one' by simply looking at it either.
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Old 10-18-2019, 10:50 AM   #60
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So if been looking through my hand book and the only 2 relays for my fan are the high and low fan relays does that sound correct
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