How about when you turn ac on? do they still work like they should?

 

Yes as soon as the AC start, both fans are running as it should!

The only things different are : there is no more low/high speed, only high and there is no more only one fan running, both are running all together, and stop all together.

Eric

 

nice find/fix!

 

I'm gonna try this today. Oh and Eric, can't believe you still have a passanger fan on the passanger side. I guess your front mount doesn't have the pipe in the way. I hear to DS's are better. I got by with the passanger side till I put in my koyo. Then it just wouldn't fit anymore.

 

Thanks guys!

Yeah the passenger side fan was touching the lower IC pipe a bit, but we moved it a bit and it's fitting very tight! We had to push the condenser bolt (along with the AC rad a bit) to make the koyo fit!

Just check if your circuit diagram is the same if it's for your 93.

Eric

 

It's for one of my 91's. Question though, why did you choose a diode over just a wire?

 

sweet find

still don't know what I am going to do but I believe I am going to try and make my Koyo fit with my IPS tdo5 kit and use two passenger side fans with this wiring.

 

This might help:

This is IPS' kit with their manifolds and MHI turbos. The fans are both factory DS "slim" A/C fans that were re-wired.

 

That is an interesting yet inexpensive and effective way of doing it. My friend left his stock '93 VR-4 with me for some work, so I did his fans last week since they were not turning on properly. I discovered that both of those wires [bl/b + gr/b] provided +12v switched that would turn on the DS fan when completed. I jumped the gr/b to ground and installed a separate hot-wire set for the PS main fan, which consists of a 30A relay, 30A fuse, and 10AWG. The car is running 20-30* cooler now lol

 

Hehe nice!

Eric

 

Great fix. Followed your instructions, which by the way was the easiest steps I’ve ever encounter and now, my cooling problems are gone. Thanks a whole lot.

 

Great! Nice to hear, what year is your car ?

Eric

 

I'll be trying this on my '92 VR-4 if not tomorrow, then sometime soon!

 

Just did this on my 1993 3K. Works like a charm. I do have one question though. Does the AC fan run constantly while the system is on? I mean when your running down the road (AC ON) with this mod, will both fans be going all the time?

 

^ I would assume yes since when you turn on your A/C the fan should always be on. So to answer your question both fans should be working full throttle.

I may need to try this on my 97...

 

Hmm..... then I believe I will probably install a switch so I can choose when I want both fans running at high speed. Dont see a reason to have both going when im cruising down the interstate.

 

I guess it depends on where you live. I usually run okay on a hot day in Phoenix when its 100+ degrees out and my A/C on-on the interstate. But I have been having issues lately if the temperature is 110 and up. The interstate no longer helps since its just too damn hot.

My solution before reading this thread was to just not drive.

-Mike

 

sweet find, I am going to try this!

 

Any word if this works on 2gs?

 

easy fix thanks.

 

subbscribed for reference.

 

I'm raising this thread up from the dead. I wanted to do this re-wire for my 2nd gen and the wire colors are different. Has anyone tried this on a 2nd gen yet?

Thanks,
Joe

 

I'm raising this thread up from the dead. I wanted to do this re-wire for my 2nd gen and the wire colors are different. Has anyone tried this on a 2nd gen yet?

Thanks,
Joe

Not yet but probably this weekend just trying to figure out the wire as well!!

 

Excellent. Please keep us posted.

 

has anyone one done 2g version in the last 4 years

 

It’s the same thing as bypassing the hi/lo resistor and looping those trigger wires. It’s discussed in this thread when swapping fans: https://www.3si.org/threads/the-fin...s/the-final-how-do-i-wire-my-aftermarket-radiator-fans-thread-hopefully.634418/. Just look at the wire colors.

 

so no matter the wire colors its still 3 and 6? i guess il verify with the diagrams later. ive been getting up to 210-215 idling and 200 cruising with bigger radiator and fmic even when its cooler out. i dont really like that