Please help with connecting A/C switch (?)

[Ejkej]

Hi All, I need Your help. I have a problem with the black wire which You can see on picture below. Where should it go to?

Is it a "ground" wire or perhaps should it be connected with a/c compressor or something else...?

BTW grey one goes to the A/C ON-OFF switch on the center console.

 

 

Thanks!

 

Edited May 19, 2011 by Ejkej

[Robftw]

Black is usually ground

[Ejkej]

Heheh, Yeah I know , but...

[cgsheen]

That's not a stock A/C system is it? Never-the-less, that's the thermostat. The little capillary tube "senses" the air temperature and the thermostat is a switch that cycles the compressor on and off to maintain a certain temp... SO - following the flow of electricity to the compressor: Your A/C ON switch starts the power supply it is then routed to the thermostat so temperature can be controlled and from there to the compressor or it's relay.

 

BUT, there may be other "safety switches" also in line... Original factory A/C systems also have a "high pressure" switch built into the receiver/dryer that kill power to the compressor if the refrigerant pressure is too high. (Some A/C systems also have a "Low Pressure" switch that will keep the compressor off it there's not enough refrigerant in the system)

 

All of these switches usually run in series along the wiring to the compressor so that any of them can cut power to the compressor.

[Ejkej]

Thanks for Your answer, I don't think it is a original A/C system, it has "made in USA" marks.

It looks like systems sold by MSA, but I am not sure - it was installed when I bought the car.