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Old February 27th, 2006, 07:39 PM   #1
BigBlkYJ 355
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Twin Electric Fans Question

So i scored a brand new set of twin cooling fans today completely free. They are from a car from the looks of it. Question is this....I mocked them up to the jeep's new radiator (a 6 cylinder one thats basically brand new) They cover almost the whole thing except for about 4" at the bottom. Does anyone think this will be a problem. Im not much for the electric fans, but for the price i could not pass this up. I would take pics but i forgot to turn the digital off the other night and it takes pretty crappy pics with no batteries
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Old February 27th, 2006, 09:52 PM   #2
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Won't be an issue. The dual electrics in mine don't cover the whole thing either and I usually run one on low for city driving even with the v8.
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Old February 27th, 2006, 09:58 PM   #3
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do u have an idea of what the pinouts are for. i have 2 blacks, a yellow and a green. im assuming 2 different speeds, and 2 seperate grounds. then they just switch the ground side instead of the hot? are the speeds both +12V with some sort of internal difference in windings?
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Old February 28th, 2006, 05:57 PM   #4
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You're probably right about the wiring and I would think it's a low/high speed configuration but there may have been an external resistor for the low speed so hooking the wires up you might find it runs at the same speed.

I had 2 14-inch fans on mine in a push/pull configuration slightly offset from each other so there were pretty big areas at the top and bottom corners of the radiator that weren't covered but it ran a nice steady temp all the time.
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Old February 28th, 2006, 06:17 PM   #5
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Quote:
Originally Posted by BigBlkYJ 355
I mocked them up to the jeep's new radiator (a 6 cylinder one thats basically brand new) They cover almost the whole thing except for about 4" at the bottom. Does anyone think this will be a problem.

Ever map out the surface area of a mechanical fan against the radiator? Just look at one that has a should. You're going to cover a lot more area.
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Old February 28th, 2006, 08:18 PM   #6
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cool thanks guys, heres a very crappy cell phone pic of the setup bolted on.....Also i think ur onto something with the resistor thing. With a 12V charger this is what happens: connect from green to one black, that fan runs, to the other black, other fan runs. connect from yellow same thing, same speed. connect positive to one black and neg to other black and.....both fans run....? didn't understand that part, but there is a section of the harness where both wires come together so im assuming its wired like that in there.

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Old March 1st, 2006, 12:54 PM   #7
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Usually the yellow is for one speed, both fans, then you connect yellow AND green to power and both fans run on high. I'll look for a diagram.
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Old March 1st, 2006, 01:02 PM   #8
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yellow is high speed, green is low speed, both grounds should be connected all the time.
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Old March 1st, 2006, 03:31 PM   #9
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cool thanks
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