Mercedes S500 w221 2008 AC compressor no power

[gbratk]

Hello,


I kindly ask anyone to help me with that.


Car Is Mercedes S500 w221 2008.
AC compressor gets no power. No DTC on any moduel. I have checked all parameters all OK. And parameter also show that AC compressor is allowed to operate.
It actually get power every few minutes for half a second and goes away. I parameter I see that AC amp jumps to cca 50mA,and then to 0.


I have change Pressure sensor already, all the same.
If I connect compressor directly to 12V it start cooling immediately, pressure is ok, and fan is working.


Can anyone help me with wiring diagram?


Thank you


Best regards


Gasper

[Meat-Head]

Sounds on face value the relay is breaking down possable due to your lack of dk activity

[wbart]

This ac compressor have prassure valve. No cluch . Mayby valve is damaged. Valve is stering from ac control module

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