Anyone have close up photos of the JDM fan installed?

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And a couple pix of the wiring:

jdmfanwired.JPG

jdmfanwired2.JPG


Installed a relay behind the battery and spliced the trigger wire off of the rear defogger relay...

I'm glad I made it a manual switch cause this fan is LOUD :o

Definitely noticed a difference yesterday while idling for 25 minutes in the hot sun :)
 
e9999 said:
one wonders how much obstruction to air flow this represents when it's not running, though... IOW, when it's not running your engine will run hotter than if it were not there...
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This was answered many moons ago in another thread with data points. No increased temps when not running...
 
Atoyot1031 said:
This was answered many moons ago in another thread with data points. No increased temps when not running...
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When my fan aren't running ( powered ) it still move free due to the air flow throught it .. thought the factory fan move enough air to go throught it without problems ..
 
Looks like a geat mod.

Any info/pics on the necessary relays to operate the fan manually? I would prefer the manual operation to be able to use while off road.

Does anyone know if this will create enough airflow to overcome a dual battery mod using the earlier rt side batt tray on supercharger equipped trucks?
 
desmocruiser said:
Any info/pics on the necessary relays to operate the fan manually?
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Sorry, I didn't take pix of the relay itself as I have it tucked behind the battery, but it's a standard 30 Amp SPST 4-prong :cool:

I usually have a bunch laying around my shop (swiped this one out of a wrecked Kia front clip)

Here's a quick and crude wiring diagram I just did in mspaint:

JDMFANRELAYWIRINGDIAGRAM.jpg


I wanted to use the OEM defogger switch, but since it's a normally closed switch, I had to tap into the defogger relay for the trigger instead :meh:
 
Cool. Thanks on the diagram.
 
It's blantanty simple:

Wire, power and switch it as if it was a set of driving/fog lamps with an appropriately sized relay (20 amps or better) and wiring.

Fire it up when you want more airflow (for whatever reason) and shut it off when you don't need it.

It is not possible to simplify it past that.
 
cruiserdan said:
It's blantanty simple:

Wire, power and switch it as if it was a set of driving/fog lamps with an appropriately sized relay (20 amps or better) and wiring.

Fire it up when you want more airflow (for whatever reason) and shut it off when you don't need it.

It is not possible to simplify it past that.
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True, although Sumotoy has an excellent write up on using the A/C's high pressure switch to trigger the relay. Not only is it stupid easy to install, it allows for a manual override as well. I never installed the manual switch on mine.

After doing this mod a year ago, I realized the biggest problem with my A/C was a [STRIKE]dirty[/STRIKE] NASTY evaporator. Once cleaned, my A/C makes ice cubes...parked at a light, in the Phoenix heat, without the recirc on:cool::cool::cool:
 
My problem seems to have been that the fan clutch wasn't working correctly. I proactively replaced it with a new "blue hub" from CDan, and the a/c works great at the stop lights now. I have been cleaning my condensor and evaporator coils regularly as well.

Funny thing, the high-tech temp guage on the dash always showed engine temp dead in the middle of the range. Either the engine cooling system on the truck is really effecient and it didn't really need the fan clutch to work optimally (in my less than strenuous driving regimen), or the guage is just flat wrong (a known issue).

Good news is, as of now, I don't think I need the JDM Fan that I had on the To Do list. Seems if all the components of the a/c system are really working properly, the system works pretty darned well. Surprising that. I would say, check all that first before going to the trouble of the JDM fan. In my case, a new fan clutch was only about $135, took 15 minutes to install, and it definitely helped.

Admittedly, the JDM fan is going to be beneficial to a/c cooling almost regardless of your system's condition. Ok, unless your system is totally dead !

YMMV

R.
 
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I tested mine with and without the JDM fan, after I cleaned the evaporator. In downtown Phoenix on a 105 degree day, the JDM fan allowed the vent temps to drop about another 5 degrees (completely unscientific test). What I've noticed is on the trail it seems to allow the a/c on start up to get cooler quicker. Perhaps this is because it runs after the vehicle is turned off for a few minutes.:meh:
 
gotmud said:
In downtown Phoenix on a 105 degree day, the JDM fan allowed the vent temps to drop about another 5 degrees (completely unscientific test).
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Good info "Stig" (I dig the avitar). Maybe when it hits 100-degrees here, I'll be putting one in anyway.
 
with really simple wiring, may want to make sure it's not left on with the engine turned off. Would do a number on the battery pretty fast, I'm sure. Some connection to a engine on-only live wire would work easily enough.
 
e9999 said:
with really simple wiring, may want to make sure it's not left on with the engine turned off. Would do a number on the battery pretty fast, I'm sure. Some connection to a engine on-only live wire would work easily enough.
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I have mine hooked up to hot all the time. I can tell you, its freaking impossible to NOT notice the fan is on when you turn off the truck. Its extremely loud. You can hear it in the cab and you CAN'T miss it when you open the door :D
 
e9999 said:
with really simple wiring, may want to make sure it's not left on with the engine turned off. Would do a number on the battery pretty fast, I'm sure. Some connection to a engine on-only live wire would work easily enough.
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That would negate Sumotoy's after run wiring setup which has been shown over the last few years to not be an issue on battery drain as it only runs for a few minutes at most, then shuts off.
 
Even on a 115 degree day, my fan never ran longer than 10 minutes after turning off the ignition. Granted, my fan is wired to my aux battery, but 10 minutes is nothing.
 
Bringing this up to the top for a question: may I have the p/n for the connector with a pigtail that needs to be purchased so that one can simply plug this into the JDM fan connector?

Thanks very much.
 
It is not serviced. You can salvage one from a 90-95 V6 4Runner.
 
Lexus Fan Mod

I used a huge fan from a Lexus sedan for my pusher fan mod. It moves a lot of air and is wired to come on whenever the A/C is running. The mod required some creativity since only one of the factory tabs worked. I also had to nip away some material from the inside of the grille, but it was well worth the trouble. I
IMG_0078.webp
 
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