I just did the E-Fan mod on my 07 1500 and I can't find a place to wire in my A/C to the control relay. Anyone know where it's easiest to access? I checked the fuse box and couldnt find one. Also, does anyone know which color wire is the high speed and which is low on the 3.8L Taurus fan?

 

You don't need to wire in the a/c it has it's own separate radiator and e-fan, and a quick google should tell you which wire is high speed.
EDIT: I googled it for you and blue should be high speed.

 

Thanks for your help Chambers! Now to just hide all the wires.

 

Glad I could help, I didn't even bother hiding mine just made sure they were all routed where they wouldn't cause any problems.

 

It's not wired that way for the ac.it's wired that way so that when your a/c compresser kicks on it also kicks on your radiator fan.It's like a saftey thing,So when your running your a/c it doesn't heat up as fast(I think).I just spliced the wire from the controller to the wires that run in to the magnetic clutch for the compresser.If you got the same fan controller that i did. it says just run either the + wire or the - wire not both.I just spliced the +.it works great.I've had mine like that for a year now with no problems.

 

You do not hook up the ac to the rad fan in these trucks. Unlike most vehicles, the ac has it's own seperate fan.