I am currently setting up an is300 electric fan conversion for my 2jzgte swap. First of all I would like to know if my wiring would be correct here


Next to find the actual thermo switch
-Some companies make a Probe that goes in between the radiator fins, I do not find this very effective because the temperature probe may fall out and will not have definite reading of the actual coolant.

Allot of stock cars with electric fans have the same kind of setup as the probe but you can build your own kit for under $40 hopefully

The thermo switch on the radiators tell the fans to turn on or off at a certain degree. The only problem is I am having is find a switch from an OEM car that will do this.
Some of the switches have one connector. This one connector will more or less be used as a ground circuit. The connector will go to a relay and it will pretty much ground and unground so your fans will turn on at a certain degree.

A wiring diagram for these kind of switches can be found at
http://www.jegs.com/p/JEGS-Performan...58607/10002/-1
Just click link to the wiring kits and hit instructions.
The second sets of switchs have two connectors.

This is the same switch as I have planned in the first diagram.
I am having trouble finding how to wire these two probe switches in. The schematics say that the probes are normally open between terminals.
*I am thinking that if it is this way my above wiring diagram is correct.

IF you know about wiring and can offer suggestion please post.

I do not want to hear: Go clutch fan because I do not want to go that way, I am aware that there is a clutch so please.

 

your plan sounds good. the only thing I see is needing a fuse between +12v and pin 30, and possibly pull the power for the thermo switch from non-switched power (most OEMs I know of the fan runs for a short time after the car shuts off).
I may be mistaken, but the diagram looks good.

 

Yea, i figured switched because My turbo timer will stay on for a bit but I wouldnt want to get stuck with a dead battery. I hate getting stuck
Anyway here is setup of my fans.

 

Nice! I will be doing the same!

 

book marking this for my 1jz swap

 

I guess you could test the second sensor by boiling it to a certain temp, and seeing if it does in fact close it.

 

It does close. All I need now is to find an adapter that will take the m16 thread and make it a m14 thread. Anyonw have any idea on where to get one of these?

 

subscribed, i was just about to start researching about this for my swap haha

 

No problem! Still need helo finding metric reducers.

 

so is the is300 ecu controls the fan or does it have a module?? could you use the coolant temp sensor from is300??? just asking I want this setup myself

 

i went to a shop to get the rad hole bigger to accept the threads for mine, its very tricky from what i was told. Did you need it for the fan trigger?

 

im booking makring this incase u get this to work. i very much want to do this as well.

 

Could you maybe buy one of these and drill it bigger?

http://www.glowshiftdirect.com/water-hose-adapters.aspx

 

Just depends on your radiator. I personally have a forged racing rad. And the the drain size is m14 x 1.5 and the actuall temp sensor location is line a m22 x 2.5 so since this wont work I need to find a sensor with the desired thread gauge.

 

Ok so after serious interviews with old schoolers. This adapter is suppose to go into the same house as the thermo
Aka. Lower.