My electric fan setup

[UNISA JECS]

I had this done a long time ago but I decided to take some pics while my car was apart, basically what your looking at is:

Radiator:
Stock OEM S13 (must be OEM with plastic end tank or you cannot do this mod exactly as I have doen with bolt on fans) no needs for zip ties.

Electric fans:
91-94 Nissan Sentra SE-R
or
91-96 Infiniti G20 (these ones are about 1" taller) * better choice but SE-R will do just fine

Top end tank:
91-94 Nissan Sentra SE-R
or
91-96 Infiniti G20

NOTE: IF YOU GO TO ANY RADIATOR SHOP TELL THEM YOU WANT THE G20 TOP REASON FOR THE IS BECAUSE IF YOU TELL THEM SE-R THE HOSE OUTLET ON THE TOP END TANK WILL BE SMALLER SO THAT THEY CAN USE IT ON THE NON-SE-R MODELS AS WELL (BASTARDS).

BUT IF YOU GOT TO A JUNK YARD AND FIND AN SE-R THEN YOU CAN TAKE TAHT END TANK AS LONG AS ITS SE-R OEM END TANK.

Pics (mines are SE-R fans and the top end tank is (well you just read the details above) but notice they come up short on the bottom, G20 fans will cover about 1" more:

http://i167.photobucket.com/albums/u159/zilvia_album/100_0178.jpg

[status:one]

nicely done.

[suaknee]

my noob question for this is, how do you wire these up?

[Nizmo_max]

Not to be a noob or anything but what's a "end tank"? ..thanks sorry for the noob ?.

[UNISA JECS]

my noob question for this is, how do you wire these up?

Very easily basically you take the harness from what ever car you choose to pull the fans from and you can wire them directly to what was once your AC condensor fans harness plug (BROWN/WHITE and BLACK) on te chassis side and the fans will turn on automatically once the cars hits I forget what temp but they do turn on automatically when the preset tempature is meet and also turn on when you turn your AC on. takes about 5 minutes to wire up (including soldering).

[UNISA JECS]

my noob question for this is, how do you wire these up?

Like this: (as you can see from the pic I used the Sentra SE-R wiring harness and the stock S13 condensor (black and blue) fan harness and spliced them togather)

http://i167.photobucket.com/albums/u159/zilvia_album/100_0217.jpg

[Big Bronze Rim]

The sentra/G20 fans appear very much like Altima fans in terms of wiring. You have two options as far as speed is concerned - each fan can be wired on low/high or relayed for both. If you want high speed, just apply power to both sets of wires, applying power to only one will give you low speed. Here is a wiring schematic I threw together a while back for wiring up altima fans. These should be similar.
http://img.photobucket.com/albums/v102/bdenton180sx/AltimaFanWiringDiagram.jpg

http://img.photobucket.com/albums/v102/bdenton180sx/PlugSchematic.jpg

[UNISA JECS]

The sentra/G20 fans appear very much like Altima fans in terms of wiring. You have two options as far as speed is concerned - each fan can be wired on low/high or relayed for both. If you want high speed, just apply power to both sets of wires, applying power to only one will give you low speed. Here is a wiring schematic I threw together a while back for wiring up altima fans. These should be similar.
http://img.photobucket.com/albums/v102/bdenton180sx/AltimaFanWiringDiagram.jpg

http://img.photobucket.com/albums/v102/bdenton180sx/PlugSchematic.jpg

I knew all of that already but thanks for posting that up because I was to lazy to go into detail good diagram :).

NOTE: Not all Sentra/G20 SR20DE powered cars come with the 4 wire fans aka 2 speed fans BTW.

[UNISA JECS]

I also did not wire my fans up to a switch wire fan controller I just simple pluged my fans right into where the condensor fan used to go and they turn on when a certain tempature is reached and or when you turn your AC, I forget what temp that is but it works fine.

[Big Bronze Rim]

I figured you did, as you already had your harness made. I just posted anyone who didn't already have it figured out. ;) Also, it would be very easy to subsiture a temp switch (you used factory) the way yo did for the fan controller ground wire and you could use the same wiring with the relay that I posted (IIRC - using your stock switch it already has a relay incorporated so you are good to go).
Thanks for the info on the Sentra fans.

[bo2o]

how come no 1 chined in when falkon240 was asking how to wire up the fans.

this sound better then doing the sohc lower temp sensor.

[coupe13]

what if your car is a base modle and dont have a/c then how would you wire is

[UNISA JECS]

what if your car is a base modle and dont have a/c then how would you wire is

It should still have the plug there.

[Size]

nice work, straight forward

[coupe13]

would altima fans work with this set up. well i want to know how to wire it so that i dont have to worry about turning the fans on/off. i feel stupid for asking

[Big Bronze Rim]

would altima fans work with this set up. well i want to know how to wire it so that i dont have to worry about turning the fans on/off. i feel stupid for asking
Yes, the Altima fans are very similar to what is listed here. They should work just fine. You can follow the wire colors I posted to help you wire them up. You can use his method of using the factory temp switch if you like.

[drift into a curb]

Hey Big Bronze Rim, I've had altima fans for awhile. Just wondering if you noticed the altima fans draw too much power. My idle/oil pressure always dips when it turns on.. Perhaps because they're wired on high speed right now, but considering everything okay, I was hoping it's safe.

Just wondering what the difference is if wired up to the relay this way.. Does it make a difference your diagram shows power is attached to 87 and 85 instead of 86 and 30? Btw I'm referring to the ground to turn on the circuit
http://www.classictruckshop.com/clubs/earlyburbs/projects/bosch/circuits.jpg

[g6civcx]

Does it make a difference your diagram shows power is attached to 87 and 85 instead of 86 and 30?

85 and 86 are non-polar. It's just like a light bulb. It doesn't matter which is which, as long as one pin gets power and one gets ground. All it does is run the current through a coil to create a magnetic field which throws a latch and connects 30 to 87(a).

Now with pin 87 and 30, technically, you're supposed to run power to 30 and source to 87. This is because on standard 5-pin relays you also have an 87a pin. When no power is applied to 85/86, 30 and 87a are connected. When you apply power to 85/86, 30 and 87 are connected. You can see this in the pix you posted. Got it?

Btw I'm referring to the ground to turn on the circuit
http://www.classictruckshop.com/clubs/earlyburbs/projects/bosch/circuits.jpg

There is no difference in how the circuit works in these 2 scenarios. Just make sure you put fuses on the 2 wires coming from the positive battery terminal.

I personally prefer ground to turn on because there is less risk of shorting the switch. Even if you grounded a wire or the switch itself by accident, it's no big deal because it's a ground wire.

If you use power to turn on, if you short the wire or the switch to ground by accident, you hope that the fuse blows. Otherwise, the wire will overheat = fire.

I use ground to turn on exclusively in my car. It's safer IMO.

[drift into a curb]

Thanks for the explanation. That rocks. +1

Makes sense why both directions work. Now I don't have to worry about my car catching on fire. woo woo

[Slow Poke]

If you have any more questions about how to wire relays, check out this link.
It should be very helpful to you...
http://www.the12volt.com/relays/relays.asp

[Big Bronze Rim]

My idle speed will dip a little for a moment when the fans kick on but it returns once the IACV catches it. It's almost seemless. The oil pressure dip is due to the drop in speed. I wouldn't worry about it a whole lot - you should be fine.

[JDM671]

guys sry for bringing up old thread but... I need some help with wiring up my altima fans. Can someone make a diagram using these kinds of relays? O and is 2 enough for both fans? ty
http://www.the12volt.com/12voltimages/relaytextA.gif

[Mr.s13r]

Bringing back this thread from the dead lol...but i wanted to run my fans off the relays and into the stock switch where it just kick on when thermostat opens but then iono where is that switch on the sr. Can someone tell me where it is?

[UNISA JECS]

You can see the plug in my for sale thread that it plugs into.

Post#10

http://zilvia.net/f/sale-items/256452-fs-s13-radiator-dual-electric-fans-plug-play.html

[Mr.s13r]

so how would u run that to the relay? Do i just run it to 86 on the relay and how? And 85 to ignition source right?

[UNISA JECS]

so how would u run that to the relay? Do i just run it to 86 on the relay and how? And 85 to ignition source right?

I dunno who your talking to, but my setup doesn;t require you to run anymore relays than what is already set in place by the factory.

[Mr.s13r]

Oh i was talking to u, so all i have to do is wire one side of my dual fal to that plug in the post #10 u were showing then right and it should kick on when thermostat opens up?

[UNISA JECS]

Oh i was talking to u, so all i have to do is wire one side of my dual fal to that plug in the post #10 u were showing then right and it should kick on when thermostat opens up?

Yes but it doesn't react to the thermostat but rather the ECT sensor once it reaches I forget the exact temp then it kicks on the fan and or when you turn on yoru AC the fans will turn on automatically then also.

[Mr.s13r]

hmm should i wire both of the fans to that or should i just wire one side to that plug and the other on a switch which i can manually switch on/off? Which way do you think is a better setup?

[UNISA JECS]

Just wire both fans to that.

[DisEpyon]

Yes but it doesn't react to the thermostat but rather the ECT sensor once it reaches I forget the exact temp then it kicks on the fan and or when you turn on yoru AC the fans will turn on automatically then also.

Im also interested in this setup.

How long would it take to test this out to see if the fans will kick on when on idle? when you notice your fans kicking on, is your needle on your stock temp gauge pass the half way point?

so if this reacts to the Engine coolant temp. sensor, the a/c relay has nothing to do with this? does the ambient switch have anything to do with this? looking at the wiring diagram, the condenser fan relay has 4 wires of course, one wire going to the fan (BR/W), (OR/L) wire going to the ECCS control module what ever that is, (L/OR) ties in with the A/C relay which goes some where to the engine room harness, and (B/W) which goes to battery (via fusible link green).

Im just curious to how it works. I dont really understand how pushing the a/c button on turns the fan on too.

[Mr.s13r]

Ok just searched around and found out that the fan will kick on around 205F, that's kinda too high for an sr don't you think? Also iono if the dual fal will draw too much amperage and cause the stock relay to be too hot?

[DisEpyon]

Ok just searched around and found out that the fan will kick on around 205F, that's kinda too high for an sr don't you think? Also iono if the dual fal will draw too much amperage and cause the stock relay to be too hot?

man, that is high for a fan to kick on, for that matter its high for any motor.

[Mr.s13r]

I need to figure out a way quick cause i need to wire it up tomorrow. If not ill just do two relays and a switch for both fans.

[DisEpyon]

I need to figure out a way quick cause i need to wire it up tomorrow. If not ill just do two relays and a switch for both fans.

thats how i have my setup hooked up for winter time.

For the summer like now, i have it to where the fans kick on in the on position/start. This way is fine. I find nothing wrong with this at all, think about it, the clutch fan runs constantly while the motor is on, so why cant electric fans run all the time when the motor is on. I have it hooked up to one of the ignition wires, i forgot which.

However it would be nice for the fans to kick on only when it needs to, but i guess for our cars we need a individual fan controller switch, since our cars fan is not triggered to come on when the thermostat triggers, instead it uses the engine coolant temp sensor to the ecu.

found this, something like this:
FAL / Flex-a-lite Electric Fan Controllers Description
An electric fan controller allows you to adjust when your fan turns on/off. Normally, on a Honda Civic stock system, the fan will only come on once the engine's operating temperature exceeds a certain threshold. With the FAL / Flex-a-lite temperature based electric fan controller, you can lower this threshold so your fan constantly brings in cool air, which will keep your Civic's engine cooler.

Fan controllers are especially effective with FAL high performance fans.

Flex-a-lite Electric Fan Controllers Key Features:

* Dial-adjustable from 180 to 240 degrees Fahrenheit.
* Freedom to set one temperature for occasional high-demand use, then reset for highway or day-to-day driving.
* Comes with a built-in A/C relay for your fan so it comes on with the air conditioning, giving your system a head start on the added cooling demand.
* Optional illuminated cockpit switch allows you to conveniently override fan function at any time. This switch can be wired to turn on the fan regardless of the temp setting (for hard pulls, short races, etc.).

Both the temperature based controller and switch can be used together and you don't have to have a Flex-a-lite fan to use either of them.

[Mr.s13r]

See i was just trying to setup this way until i can get a DIF dual fan controller but then i found out how UNISA JECS did it his way and i was interested because it can just kick on by itself anyway why bother to spend 100someting on a DIf controller?

[aziankingz]

i have my fan wired to the ac fan harness and it never turns on, unless i turn on my AC or defogger..

[UNISA JECS]

Well guys I had my fan setup for almost 3 years and almost 1 and half years was turbo KA-T and I live in hot as california and I never had an over heating issue, to the guys that asked about the position of my temp needle, I dont go buy that I had Nistune to monitor my temp needle and everything was always normal but to answer yoru question my stock temp needle has always forever been at the normal location which is right about the half way mark.

[die hardrift fan]

sorry to bring up an old thread but this is a very good thread. i was wondering when you wire to your ac do the fans kick on high? or do they know whether to kick on low or high depending on temp? is there anyway to have it so they are still variable as in low or high when needed? and also wire a manual override switch to turn it off/low/ or high with the flip of a switch as well as auto with the ac temp? i wasnt sure what the outcome was when they are wired with a relay with the diagrams above. thanks in advance

[df3kt760]

i was wondering how much did they charge you at the radiator shop to do this i have g20 2spd fans and top end tank and extra radiator and was thinkin of taking it but i wanted to know an estimate