A/C 02 Saturn L 300

Tiny
SATURNTECH9
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After you cut the wire at the fuse box what is the reading at the green wire at the compressor?Also are you saying you have a connection to ground at the cut wire going into the fuse box. Do you have a blub test light?If so take the clip end and put it on the green wire see if the test light light's up if it does the wire is grounded. Also that black wire is supposed to be ground but if the green which feeds power is grounded then the fuse will blow. With the meter it should read out of limits or no reading at all to ground.
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Tuesday, June 7th, 2011 AT 10:23 PM
Tiny
YUKON JOE
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Where I cut the wire about 6 inches from fuse box then tested it and the fusebox side reading was the same.8. And at the compressor theres no reading, cause the wire is cut? Plus the fuse dont blow till I plug in the pressure switch and if its plugged in it will also blow if I turn the a/c on inside?
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Tuesday, June 7th, 2011 AT 10:41 PM
Tiny
SATURNTECH9
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Unplug the a/c relay then see if the green wire going into the fuse box is still grounded.
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Tuesday, June 7th, 2011 AT 11:29 PM
Tiny
YUKON JOE
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Yes the reading is the same?
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Wednesday, June 8th, 2011 AT 12:21 AM
Tiny
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Do no if it matters but I checked it with it running and the ac button on today and there was no change in the green wire yesterday I thought it went from.8 to 13.7 but I guess I was wrong yesterday? Also I checked the black one with the car running and the ac button on and it read like 21.2 today? Like I said dont no if this matters but I dont no what else to check now? Should I start inside at the a/c button light and look for bad wires? Thanks again
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Wednesday, June 8th, 2011 AT 1:09 AM
Tiny
SATURNTECH9
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I posted a wire diagram that shows how the a/c fuse feed's power to the switch side of the a/c relay when the relay is given power and the relay triggers then sends power thru the under hood fuse box then out to the green wire to the a/c clutch. All this checking iam asking you to do is key off a/c off etc. You may have to take it somewhere to have it looked at. When your checking something like this you can't just go all over the place you have to just start from one end and work your way to the other end of the circuit.
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+1
Wednesday, June 8th, 2011 AT 2:16 AM
Tiny
YUKON JOE
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Ok I wont check it with the key on again I started at one end then ended up at the fuse box and didnt find nothing, ididnt mean to go all over the place but I thought maybe checking with the key on might tell you something? What about the diode how does the that connect everything and could that circuit be messed up? And I dont think any place around me could figure it out even the dealers arent very bright.
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Wednesday, June 8th, 2011 AT 2:43 AM
Tiny
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Do you think I need to pull the fuse box apart to make sure nothing is bad where I cant see it? I tried to get it apart but couldnt, I unscrewed the bolts to the plugs on the bottom of the fuse box but it wouldnt come apart, do I need to take all the fuses out to get it apart do you know?
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Wednesday, June 8th, 2011 AT 2:45 AM
Tiny
SATURNTECH9
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Lets not take apart the fuse box if try too you could ruin it. Try this remove that diode and see if the short to ground goes away to that green wire going into the under hood fuse box.
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Wednesday, June 8th, 2011 AT 7:38 PM
Tiny
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Yes when you pull the diode it reads nothing it goes away.
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Wednesday, June 8th, 2011 AT 7:54 PM
Tiny
SATURNTECH9
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Alright now were getting somewhere the diode is supposed to keep the flow of the circuit going one out and not allow it to back feed when the a/c clutch turn's off and keeps spinning it makes voltage and sends spikes back thru the circuit the diode keeps those spikes from doing any damage. Get yourself a new diode and lets start there.
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Wednesday, June 8th, 2011 AT 8:59 PM
Tiny
YUKON JOE
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Ok I have to wait till tomorrow and get it from the dealer. Do you know if they sell them at advance or autozone, they said no?
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Wednesday, June 8th, 2011 AT 9:23 PM
Tiny
SATURNTECH9
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That is a very uncommon part I doubt those places would have something like that your best bet is the dealer or ordering it from the internet.
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Wednesday, June 8th, 2011 AT 9:26 PM
Tiny
YUKON JOE
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I finally got the diode put it in and everything tested good but the a/c dont work its getting 12-14 volts to the compressor now, so does that mean the clutch is bad? If so are they hard to do and do you have to evacuate the system to do it?
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Saturday, June 11th, 2011 AT 1:50 AM
Tiny
SATURNTECH9
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With the engine shut off does the center of the clutch turn freely?With the engine running if you have power and ground to the clutch and its not engaging and spinning the center then you have a bad clutch its better to replace the whole compressor. You will have to have the system evacuated and recharged when your done. You will also have to balance the compressor with oil.
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Saturday, June 11th, 2011 AT 3:50 AM
Tiny
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Yes the center turns freely. How can I be sure I got ground to the compressor can I check the ohm reading like I was doing if so what should it read? Also the relay clicks and the idle goes up a little but the fan dont come on for the compressor, does it not come on till the compressor actually runs? I just want to know that so im not tryin to fix everything if its just the compressor i'll do it.
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Saturday, June 11th, 2011 AT 4:48 PM
Tiny
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Now I just went out and checked it again and I had my wife turn the ac on and of with the car running and not and tapped the compressor with a hammer to see if I could get a click? And after that I checked for 12 v and didnt have it at the green wire and im positive I checked it yesterday thats why I told you I had 12v?
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Saturday, June 11th, 2011 AT 7:12 PM
Tiny
YUKON JOE
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My mistake it must only get power when the car is running I checked and 12v, I thought for sure i've been checking with the car off but must have not been. I checked the green and black and reversed them and 12 v both ways so the ground must be good and the center turns freely by hand, that suck it wont engage. Still wondering about the fan too if you could let me know?
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Saturday, June 11th, 2011 AT 7:38 PM
Tiny
SATURNTECH9
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On that car the a/c condensor fan only runs at certain vechile speeds a/c pressures temp etc it doesnt just run because the ac is on. Sounds like a bad ac clutch though from what you have found.
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Saturday, June 11th, 2011 AT 9:30 PM
Tiny
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Do you no if there is a internal fuse or something on that compressor?
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Saturday, June 11th, 2011 AT 10:24 PM

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