How to replace a/c compressor on 94 Cadillac fleetwood. Refrigerant has been evacuated.....

the correct radio wiring layout
1994 Cadillac Fleetwood Stereo Wiring

before doing anything make sure you have traced all the wires and colors and are sure your facts are right

radio operation not part of that modules function


bmr repaced . ok thats great and it works


if in any doubts ring them back and ask the questions
.take it back to the workshop for clarification

If the old compressor is bad and the a/c system is still charged with refrigerant, you're going to have to take it to an automotive A/C shop to have the system evacuated...even if you plan to replace the compressor yourself. Then after replacement, you'll have to take it back to the shop to have the system recharged. If you're concerned about the shop marking up the price of a new compressor, ask them if you can provide the replacement part for them to install after they evacuate the system. That way, you will only have the labor to R&R the compressor and the cost of evacuating and recharging the refrigerant.

Check with the auto parts store to see if they both have the same part no's. It's quite possible they are the same.

If you can check the part numbers stamped on the two different pumps and they are the same then that answers your question.

You will need to recharge it to get it to come back on, it has a pressure switch that will prevent operation until the level is brought back up to normal.

in the trunk

without a scan tool and/or a DVOM you will be guessing as whats wrong

since you made no comments in tour post about physical brake issues then you are most likely dealing with a wheel speed sensor issue

however, you need the codes pulled to verify which sensors need replacing

first "Evacuate the system" make sure it holds 18" of vacuum. If it does it is safe to charge you must put the oil back in the system after evacuation and before the refrigerant. The amount of refrigerant should be marked on a label under the hood.

You need to replace it with a compatible oil for r134 and replace the offrice tube with a r134 tube.

Hi!

First, I'd try checking your local Library for an AC repair manual. An Ac system has a number of different parts that all work together to cool.

That said, there are some things you can check that are easy.
First, Check the controls. Is the AC on, the blower on, and the temperature selector set on cold? Really check, because this is what is wrong about 10% of the time.

Next, with the car off, find the AC compressor. Is the belt still on it? Have someone start the car and turn the AC on while you watch the compressor. The outer part should turn, and when they turn the AC on, there should be a click, and the inner part will start to turn as the clutch engages.

Next, Look at the fans. If your car has an electric fan, it should come on when the AC has been on for while. If your car has a manual fan, then it might be the fan clutch, but there isn't an easy way to check this.

If it isn't one of the above, then you are probably out of DIY territory. Because of this car's age it probably has R-12, an older type of refrigerant that is no longer manufactured for environmental reasons. The $1100 for the compressor replacement seems high, but that should include evacuating the system and recovering the refrigerant, replacing the compressor, receiver/dryer, and expansion valve, flushing the system of the old refrigerant and oil, replacing the oil some that is r-134 compatible, and installing the updated fittings and o-rings for R-134. You can see how that adds up in terms of time and Parts.

Good luck!

-ellie
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