yaris 08 sedan ac stuck on

[joe31]

the ac in my yaris 08 is stuck on, since winter is coming its not very practical.
i've try to unplug the little wire plug that enter the top front end of the ac and it shut down.
As I see it ( correct me if i am wrong ) this wire feed the ac clutch, so the problem doesnt seems to be machanical but electrical.
do this circuit have a relay on the ac clutch line , if yes where is it??