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A\C inoperative 300E

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Old 05-08-2007, 11:03 AM
Walter's Avatar
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Join Date: Aug 2004
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Default A\C inoperative 300E

This car has the mass control unit. Could someone tell me which pins on the relay power the A\C compressor as I can get it to work if I power it direct from battery.
Upon disconnecting the wire plug from the compressor, I do not have power through any of the 3wires ground to lead with the key on.
I suspect the MAS but more importantly perhaps I have a short at the compressor clutch. Please help.

 
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