2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Cooling fan

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Old Jul 8, 2010 | 04:45 PM
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Cooling fan

Another wiring question. Clip number F74 goes to which fan , my setup was previously hacked and currently goes l/b off oil cooler fan (single) to a toggle which couples an e-fan together through main fuse, not proper at all. so im trying to fix that ,rewiring the efan to aarons specs but i dont think the oil cooler fan should be wired to the efan , btw its in between s4 and s5, motor turb and exhaust mani are s5 , uim and lim are s4 , no emissions (wiring removed too) no ac , no aas , no p/s all removals on my car include removing unused wires from harness.
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Old Jul 8, 2010 | 05:08 PM
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You have an oil cooler fan?
That's hardcore.
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Old Jul 8, 2010 | 06:00 PM
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Why is it hardcore?
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Old Jul 8, 2010 | 06:10 PM
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Because it's very difficult to find a decent fan of the proper size and most would consider it unnecessary anyway.
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Old Jul 8, 2010 | 06:15 PM
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that is hardcore i guess then , it would be even better if the cooling system wasnt hacked
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Old Jul 8, 2010 | 07:09 PM
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Any efan could be considered a "hack", depending on how pejorative you consider the word to be.

I'm not sure what the problem is here, Aaron's writeup seems pretty straightforward and there are other- even simpler- ways to do this that don't require any interface at all (excepting a +12v tap) with the stock electrical system.
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Old Jul 8, 2010 | 07:18 PM
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no if you look at the harness there in lies my prob the efan i can deal with easily , I have already replaced coolant temp sensor(s) wiring as it was mostly cut out also ops was cut out of wiring and now y/b and y are hanging at front harness with connector f74 , nothing to connect that i know of. Im not looking for what i could do instead , im bring it back to stock specs , yet there is no cooling fan motor to connect to , atleast not what i see other than the oil cooler fan
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Old Jul 8, 2010 | 07:33 PM
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The Y/B and Y wires (which my diagram show as connector G-23) are for the fan that went on the AC condenser (if your car was so equipped).
There was never an oil cooler fan from the factory, so that's definitely a "hack" (albeit an interesting one).
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Old Jul 8, 2010 | 07:39 PM
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hmm intersting , car was equipped with ac , but this is definately f74 of wiring section of fsm available in faq , page 50-38 s4

the oil cooler fan looks stock minus the wiring
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Old Jul 8, 2010 | 07:59 PM
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OK, I was referencing the S5 diagram, so, my bad.
Happen to have any pics of this oil cooler fan?
I've never seen one...
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Old Jul 8, 2010 | 08:00 PM
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its dark here but i could take some tomorrow after i get out of work for sure
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Old Jul 8, 2010 | 08:02 PM
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Thanks, I'd appreciate that.
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Old Jul 9, 2010 | 09:44 AM
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Harley Davidson radiator fan...It's on my list of things to do. I'd like my oil temps a little lower in traffic and it seems my now larger intercooler end tanks are restricting flow a little. I'm planning on ducting up from the undertray and installing one of these fans.
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Old Jul 9, 2010 | 09:50 AM
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Originally Posted by Aaron Cake
Harley Davidson radiator fan....
Oh Jeebus.
As cavalier as I am about mixing in parts from other vehicles, the idea of using a Harley part makes my skin crawl.

Clearly, the fan can't be very big, so do you use two or just one?
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