The standard wiring for this fan follows the 4-pin PWM convention, though wire colors can occasionally vary by manufacturer batch. Pin Number Typical Wire Color Description Black Ground (GND) 0V connection. 2 Yellow (or Red) +12V DC Power Main power supply for the fan. 3 Green (or Yellow) Sense / Tachometer Provides speed feedback (2 pulses/revolution). 4 Blue Control / PWM Receives speed control signals from the motherboard. How the Wiring Works
Receives the control signal from the motherboard to adjust fan speed. OEM Variations to Watch For foxconn pva092g12h wiring diagram work