For some reason my fan is constantly running. The fan is connected to the warmup LED which seems to work fine via Tunerstudio, I am able to change the settings and the LED is turning on and off. I didn't build the Megasquirt so I presume there is something wrong with the fan circuit.

The car is a 1.8 MK1. Any help would be gratefully received.





Tim

 

Why did you build a second circuit on middle led? That redundant transistor is the problem

 

Sorry bit of of a newbie, so I should just wire SPR2 to the middle led?

 

Yes.