Hi Paul, once the controller is connected and the car is idling you can adjust the trigger for when the fan goes on, but turning the mini white dial with a small flat screwdriver clockwise. From what I've noticed the dial is a bit sensitive so try to not be too rough with turning the dial
@@CARJOURNEY thanks that is correct the fan does not switch on .Tell me the out put to the fan is it going to the negative or positive. I get my 5v on the board if I test it with the multimeter but no out put power on the board to the fan .
Thanks for checking, an easy test would be to test for continuity between ground and the trigger wire, if it grounds out then you can do a battery direct to the fan, and the negative of the fan to the controller. If I remember correct the whole purpose is to see that when a certain resistance point is met the fan gets grounded triggering the fan to switch on. I ran mine to trigger a 5 pin relay to trigger two electric fans, one push and one pull. Let me know if my suggestion works, there are a couple of sellers selling similar circuits but they all operate more or less the same.
