I did some further electrical testing, and this is what I think:
Set condition tested:
With the A/C Switch "ON" and fan speed high, recirc-hot air inside car, selected on dashboard controls, after I had the engine running.
I checked for 12-VDC at the plug on top of frony of compressor. I DO HAVE 12-VDC!
The compressor clutch should pull in, with 12-VDC applied at that connector, to energize the COIL! IT DOES NOT!
Therefore I suspect the Compressor clutch 12-VDC COIL has failed! DO YOU AGREE?
Thought process: If a pressure switch was preventing the clutch-plate from pulling in, to turn the compressor shaft, there should be NO 12-VDC present at the power-in connector to the clutch-coil. Am I correct?
SO next question: Do you know if I can buy and replace JUST THE 12-VDC COIL?
OR must I replace the entire Clutch Assembly, on the front of the compressor?
Please reply A.S.A.P.! I'd like to get this finished BEFORE the REAL-HOT weather arrives!
This does NOT answer my question!
1. I am unable to open, or read ANY of the diagrams, or Schematics, that you have sent me. All I get is the message:
"You are not authorized to view the requested information."
2. This Saturn only has the HOT 12-VDC wire, going to the electrical connector on top of the clutch, to feed the coil, that engages the plates so the compressor will turn. What this means is that because the compressor is bolted to the Engine block, and the Engine has a LARGE Ground strap, that connects to the battery's NEGative post. There is NO WAY there could be a bad ground. I am an electrical engineer.
3. I used a "VOM" DC-voltage Meter to read the 12-VDC, because I did not have a test light. There is no wear of the wires or bad connections, so I do not question having enough 12-V power, to engage the clutch.
4. My question was, & still is: DO YOU KNOW IF ONLY THE 12-vdc ELECTRO MAGNETIC COIL, CAN BE REPLACED, or must the entire clutch assembly be replaced? I have the PULLER-Tool(s) due to my associate having an A/C business. He just is unfamiliar with Saturns.
5. I do not believe that the Compressor is bad. Therefore I do not plan to spend the money to replace it. The LESS $ I must spend, the better.
Do you know of a Web-Site where I can buy Saturn Parts at wholesale, or at a discount?
I will need either a Coil-Assembly, or entire clutch & Electromagnet Assembly if that is the only way it comes.
I will pay some more money to "just-answer".com, if you can definitely clarify this, and answer my specific question(s)
Thanks for your responses! They are greatly appreciated, and I am NOT annoyed that we have not gotten to a solution to my problem yet.
We could see NO pressure switches anywhere along either the "Liquid-Line" NOR the "Suction-Return" Line(hoses) that would be considered in the engine compartment (under the hood) that is.
Please reply, even if it needs to be Monday.
Just to let you know, I went back and tried again to view & print the diagrams.
THIS time; it works when "view full image" is clicked on!
I plan to pull the clutch, and try to find that "High-Temp.-Fuse"! Do you know if it is difficult to get at, and is a replacement fuse something special from Saturn? Or could it be available at an Auto-Parts Store?
I will also check Current draw, just-in-case the clutch coil is shorted, THAT would cause the high-temp-fuse to blow! I'm not surprised really, at almost 9-years (will be in Sept) we've had this car. Never had any A/C problems before, and this clutch IS a high use item, because it runs not only when A/C is needed, but also when the windshield-defroster is on, and the "temp-knob" is not on full heat.
Thanks for your help! I will try to let you know how I make out!
Important: It is not necessary to discharge the A/C system to service the A/C compressor clutch.
Important: The next 7 steps are only necessary if the vehicle is equipped with a secondary air pump reaction system (AIR).
Notice: Ensure that A/C discharge line does not change position and/or loosen at the condenser connection due to moving discharge line. Failure to ensure a tight connection will result in a system refrigerant leak.
Important: Be careful not to lose shims inside of the clutch drive plate opening when removing the drive plate from the compressor shaft.
Notice: Do not remove pulley without puller adapter. If A/C compressor shaft is pressed on, A/C compressor will be damaged.
Important: Make sure to hook the puller jaw behind the pulley.
Important: To enable easier removal of the screws, lightly tap on the end of the screwdriver with a plastic hammer.