I am trying to find a coolant temp sensor to use with my aftermarket fan controller that will thread into the air bleed screw location on my koyo radiator.

The sensor that came with my controller is huge, and will not fit anywhere.

Does anyone know the thread pitch of that hole?

 

where is that air bleed screw? mine dont have one.

 

Scratch that idea.

Where is the 12v ign wire located in the engine bay that kicks the a/c on when pushing the switch inside the car?

 

for your sensor you probably want something like this.

http://www.summitracing.com/parts/FLX-32082/?rtype=10

 

I just want to know where the switchable 12v source is under the hood that will allow me to run my fan using the interior a/c switch.

I gave up on fan controllers, and coolant temp sensors.