Replacing CPU fan on dell 4700

[Unholyimage]

Hello,
Same old story, replacing cpu fan on dell 4700 with 92mm pwm fan. Both have 4 wires but the dell has a funky proprietary 5-pin connector. I suspect the wires are probably for 1. power 2. ground 3. sense 4. control, but I need to know which colors are which function on this machine. Anyone know or know where I should go? thanks

 

[dogman_1234]

I have posted on your original. Go there please.