Wait, that won't work or high speed unless 42 and A/C signal at same time. Let me fix it.

 

according to that, how is the left cooling fan suppose to operate on its own? Pin 42 activates the relay which connects power to the top of the fan but the ground isnt there until the AC trigger activates the middle relay which will swich the bottom wire to ground.

 

haha ok, thank you again for the help. glad you picked up on that as well

 

That would have to work. Pin 42 must be energized when the A/C is energized. If it is, your first diagram should work to turn the left fan on by temp, and both fans by A/C.
Mine would have both run slow by temp, and both run high by A/C.
Does anyone know if pin 42 is energized both by coolant temp and A/C?

 

how about this:

 

That would make the left fan only run by pin 42, and right fan only by A/C, if pin 42 is not activated by the PCM during A/C. Also you would not need the relay on the right in that setup, just run hot straight to the fan.

 

after looking at this, this will work but its identical to what i already drew, just changing pin 42 and the AC trigger around as well as the grounds you drew to 12V+

 

this is absolutely killing me. lol

 

I think I got it, give me a second to draw it up

 

I forgot to ask if you have enabled pin 42 by means of a tuning program.