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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fuses blow because the current flow is in excess of the fuse rating and that is normally from a dead short in the circuit after the fuse
I suspect that the ac compressor rely is faulty and I would start looking in that area
unplug the clutch cycling switch its on the accumulator jumper the the wire plug ccs also works as low pressure switch and will cut off a/c comp when system is low on freon you may also need to disconnect negative cable from battery for appx 10 minutes leave jumper until system charged then remove it plug connector into ccs (clutch cycling switch ) on accumulator if properly charged system should cycle on and off
Check in this order:
Is the compressor starting when you turn the car on?
If not: is the fuse burnt, broken wires?
If not: Is the linkage that connects the frame to the left rear shock broken or seized? (more wires to check here).
If the compressor runs and the linkage is functional, spray some windex (or soapy solution) on the rubbers of the rear shocks and around the hoses to see if air is bubbling out. If so, this is where the problem is.
Many aftermarket shocks/struts are available (check ebay) online for as little as $ 150.00 each, and $ 175.00 for the compressor.
It is located behind the Passenger side rear tire. If jacked up and you climb under from rear bumper look to your left in between gas tank and tail exhaust. Good sized box with wire harness and clip on it. Also if your air ride is not working in some cases the Air shock(s) may be defective the pump will not kick on
You may have a leak in the rear air bags or the compressor for the air bags is not working,listen when you turn on the key to see if you can hear the compressor run ,if you do then likely the bags,if not then likely the compressor.
diswconnect negative battery cable remove plastic rock shield at rear of starter remove battery cable from starter remove purple wire from solenoid remove bracket from front of starter remove two bolts from back of starter, manuver starter out. if previous work has been ay have to raise the engine thi procedure is for the 4.9 engine
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.
I have seen this happen on my 1990 cadillac. I haven't had any problems on my 1997 Cadillac Limousine, because I never had a low charge on that car.