Question about 1993 Cadillac DeVille

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1993 Cadillac deville rear brake air compressor stoped working,i unplugged the wiring and used a jumper wire from the battery and it worked,where do I go from here,

I removed the compressor on a table I cleaned it then with a jumper wire from a battery it worked,i checked the connection their is power there,also I can't figure which relay it uses,all fuses are good,any ideas? Help please.

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Check the fuse

Posted on Apr 30, 2015

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In my 1990 Cadillac Deville there is a sticker that says that one can reset the computer that controls the compressor by disconnecting the battery for a few minutes and reconnecting.

Did you disconnect the battery to reset the a/c system?

The symptoms you are describing lead me to believe that there is a safety feature that prevents the compressor from engaging when the compressor has been run for any length of time without at least .5 lbs. of freon in the system.

You said that you had to run a hot wire to charge it up with freon. But, if you ran it without freon, it may have automatically invoked the 'safety' feature.

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