wiring up electric fans

[carheadman]

so i've been trying to do some researching and i can't seem to find any info on how to wire it up to my temperaur sensor....this is on an s14 and the electric fan that comes stock on the car has 4 wires can i just tap into those...if so which ones....i noticed that the stock fan does seem to kick in when the car gets pretty warm so im thinking that would work. Thanks you in advance

[rioredstang]

I think the fan on the s14 is a two speed fan. It has (2) grounds black wires and (2) power wires. You can unplug the wires to the fan and back probe with a test light hooked to 12v. this will tell which ones are ground. Then the other (2) wire will be power. The low speed fan is W/red wire. I would use this wire for your fan.The computer controls the cooling fan relays to turn the fans on and off. You can use a infrared temp gun to test the sensor on temp.