ok so took some pics of how i wired my switch.
once again my artistic rendering of the schematic


Fan to relay: pin 87(yellow wire)using t tap connector


next is pin 30(blue wire)to battery ground. you don't have to connect it to the negative battery terminal.



then pin 85(white wire)to any solid ground. i used the one right above the battery ground.


then pin 86 (black wire) to your power switch. (in the car if you want a switch in the cabin).


i removed the wiper arms and cowl piece and ran the wires through the boot behind there. these were the best pics i could get showing where i ran the wire

you then need to run the other terminal of your fan switch to a constant 12v source. i used the fuse panel in the driver side footwell and just pressed the wire from the fan switch in with the fuse




then just ground your switch(and wire light if equipped) and you should be able to test the switch to make sure everything functions.
here's the switch while ON


hope this helps anybody that's on the fence about installation. overall i'm very happy i decided to do this



Sent from my iPhone using Tapatalk

any chance of larger pix ?  this still interests me .. but it also terrifies me.  and what kind of relay did you use ?

Quote from: TopherSho on June 08, 2017, 03:47:38 PM
any chance of larger pix ?  this still interests me .. but it also terrifies me.  and what kind of relay did you use ?

sure. pics of what specifically?  this is the relay i used
https://www.amazon.com/gp/aw/d/B00009WC2Q/ref=yo_ii_img?ie=UTF8&psc=1
. . any standard 30/40amp relay will work. overall the install was pretty damn easy. hardest part is running the wires into the cabin


Sent from my iPhone using Tapatalk

Quote from: Colorado-SHOBro on June 08, 2017, 06:19:41 PM

Quote from: TopherSho on June 08, 2017, 03:47:38 PM
any chance of larger pix ?  this still interests me .. but it also terrifies me.  and what kind of relay did you use ?

sure. pics of what specifically?  this is the relay i used
https://www.amazon.com/gp/aw/d/B00009WC2Q/ref=yo_ii_img?ie=UTF8&psc=1
. . any standard 30/40amp relay will work. overall the install was pretty damn easy. hardest part is running the wires into the cabin


Sent from my iPhone using Tapatalk

All of them I was curious about how you made the attachments / connections / splicing

wanted to update this thread with a little experiment i did today. i've had the manual fan switch for 1 fan in the cabin but preparing for track day coming up i wanted to be able to run both fans with the car off. so i tapped the 2nd fan and soldered on a terminal clip so i can clamp it on the - battery terminal in the staging lanes. pic below

ill unplug it completely for anything but track days.  here's the experiment drove the car in 70* weather and turned it off and let it heat soak. here's the IAT2 coolant temps before i turned on the fans on


7 minutes after running the fans w/hood open in my garage


15 minutes with fans on:


battery voltage dropped to 11.6 so i started the car(with no struggle) and iat dropped a little more after 15 seconds running.

so. . 31* drop in IAT2 after running the fans with hood open and car off. ill take it!!


Sent from my iPhone using Tapatalk

Not bad at all. Simple mod too.

Quote from: TopherSho on June 08, 2017, 03:47:38 PM
any chance of larger pix ?  this still interests me .. but it also terrifies me.  and what kind of relay did you use ?

To see larger pics, if using desktop, simply right click on the pic and open in new tab or window.  On a mobile device, keep your finger pressed on the image until the option to open in new tab comes up.  The original pic is quite large.

I may look into this, I struggle with these high iats also!!!


Sent from my iPhone using Tapatalk

Has anyone confirmed this mod doesn't cause issues with the engine on?

While in the staging lanes the fans would still stay on full blast while turning on and off the engine.

I don't know about whether the mod causes issues with the engine on... but I do want to know how you set up the tuner to display those specific gauges.  When I select gauges/datalog and put it in that layout that shows 8 items, its a bunch of stuff I don't care about while driving.  I didn't know you could change which 8 it shows.  I'd love to have it show IAT2, wastegate, boost, etc.

Yall might want look at the wiring diagram for the cooling fans. On my 13PP fuse F70 supplies power to the control side of the three cooling fan relays and is hot in start or run. the only thing that needs to be done is manipulate the grounds at the PCM connector. For my year it is pins 34 for the low cooling fan relay and pin 18 for the high cooling fan. Seems it would be easier to just run wires from the PCM connector under the cowl and run it in the inside than have all those wires under the hood. Just my $.02