Ok first question is, will pin 33 on the red connector turn my fans on high. I'm using HPtuners and it has a spot for stage 2 fan control. Right now that wire is being used for (recirc door).

If I can't do that I would like to find a wire thats grounded when the a/c turns on. I've found a wire that has 12v when the a/c is on (dk grn/wht by the running passed the alternator) I will have the change my wiring a little to use that.

 

I Did flex a lite (282) monster fans this weekend, I Pluged the A/C Wire into the A/C Relay socket. So when the relay comes on so does the fans. I'm having problems with the friggin "Thermistor" it don't work at all, and it's gonna screw me out of going boating this weekend. I don't feel like taking it all out again . But yeah, try tapping into the A/C relay and you'll know when the ac is on so will the fans... Stay Cool