Electric fan

[NP240sx]

i finally have the harness for my 350z fans...but which wires do i connect to set it on high speed? there are 4 wires black, yellow, blue, and green...i tried all the color combinations and i cant figure out which one sets it to high thanks again!

[samej82]

In my opinion, from what I read the fan is controlled by the car's ECM... The 3 step control (High, Low, Off) correspond to the vehicle's speed, engine coolant temp. , refrigerant pressure, and air conditioner on signal. I don't think you can do anything to the fan itself other than plugging it into harness... if there's a problem with the speed after than you're going to have to check the various sensors to see if they're functioning correctly. Good luck.