Hi everyone. I’ve read all the forums related to my problem , but haven’t found solution. Shortly , I have is 250 2007 and the driver side fan is not working at all. First I changed the motor, but the problem is still there. I’ve checked all the fuses and relays , all of them are working. Moreover , I figure out that when I disconnect the fan on the passenger side there is a voltage on a driver side , but whenever I connect driver side motor it is not spinning. Additionally , the relay n1 has no voltage all the time. Sorry for bad English , hope u guys understand me.

 

I'm just guessing but can the secondary fan connector reach the primary fan? Is it possible that the connectors need to be swapped? Passenger side fan connector to drivers side fan and drivers side fan to passenger side? Also, isn't there typically a temp sensor that activates the 2nd fan once the engine gets hot enough.

Maybe somewhere along the line the secondary fan might have become your primary and your primary doesn't come on until a certain temp is reached like the secondary fan would?

 

Yeah , actually I are saying true , but I checked same car. And relay 2 activated both fans.