ecm controls it and the ecm grounds the low speed relay on driver fender when commanded by the programming in the chip , stock is around 195 , TT chip is 168
heres the fan troubleshoot Fan Trouble Shooting
you can force the relay to activate using the three pin connector from the a/c line at back of compressor, just key on and ground the green wire in the connector
that said if you find your OE relay is activating and sending power out , check your plug on the plug and play for burnt terminals especially the ground
A few years ago at LVD, after I put on the TE62 and other supporting mods. With borrowed 9" slicks no less. Haven't raced since as I don't want to beat the car anymore, just enjoying it as a fun street/cruise night car, LOL. I'm going to see if I can figure out the fan issue. I may need help though as i'm not great with electrical issues. Mechanical yes, electrical no. I'll let ya know how it goes.