Radiator Fans

Ok i just swapped in my JDM SR20DE and got everything running great except my mother fucking radiator fans won't come on. WTF. I tested the temp sensor ( the one that send the ecu info) with a lighter and the fans came on but when my motor is running the mother fucker won't. So my circuts are good, i replace my thermostae and its good.... i bled the system the best i can and that didn't help...any more sugestions on how to bleed the system and what the problem could be???:( :confused: :confused:

i have a similiar problem too,
my engine be overheating, the dam fans dont be coming on!
how did you check your temp sensor?
a lighter? huh?