I was having a problem getting my a/c and heater controls to work right. Everything I turn on only blows out of the defrosters. Someone said it might be the colored vaccum lines behing the a/c and heater controls. well I looked at the vaccum lines and they looked fine, But I noticed a plug with a pink and an orange wire on it and it is disconnected, I have no clue where it goes, so maybe this is the problem? does anyone know where it goes? or anything else that could cause the problem?
thanks!

 

anyone notice where this plug goes, its really bothering me
thanks