Having a/c problems any body know where the pressure switch
And a/c cycling switch is located at
a/c question
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RJolly87
- Certified Bonneville Nut
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1994 Buick Regal Custom - Location: Las Cruces, NM
Re: a/c question
The pressure switch is in the compressor, and cycling is controlled by the PCM.
~Randall~
1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place
1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place
Re: a/c question
So wat do u think if I put power where the relay is it engages the clutch
I just filled it with two pounds of r134a nd I can't figure it out so the cycling is controlled by pcm
Do u think I could have a bad climate control cause I turn it on and I have no power getting to the compresor
It only works like I said wen I put power thru the relay any help apreciated thanks
I just filled it with two pounds of r134a nd I can't figure it out so the cycling is controlled by pcm
Do u think I could have a bad climate control cause I turn it on and I have no power getting to the compresor
It only works like I said wen I put power thru the relay any help apreciated thanks
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RJolly87
- Certified Bonneville Nut
- Posts: 5403
- Joined: Tue May 27, 2008 8:53 am
- Year and Trim: 1993 Buick Park Avenue
1994 Buick Regal Custom - Location: Las Cruces, NM
Re: a/c question
What was the original problem before the refrigerant was added?
How was refrigerant added without the compressor coming on?
Did it quit working suddenly, or fade over time, and how long has it been happening?
How long ago was the refrigerant added?
What do I think if you put power to the clutch directly? It's a very bad idea, especially if it is done for more than just a few moments as troubleshooting. It's not coming on for a reason. Also, if something happens down the line (like low refrigerant) there is now way to kick out the compressor to prevent damage.
We should probably have someone with a Factory Service Manual help you chase the A/C circuit out to see whats going on. You can also leave it to the professionals, and they should be able to track it down pretty quick with specialized equipment.
How was refrigerant added without the compressor coming on?
Did it quit working suddenly, or fade over time, and how long has it been happening?
How long ago was the refrigerant added?
What do I think if you put power to the clutch directly? It's a very bad idea, especially if it is done for more than just a few moments as troubleshooting. It's not coming on for a reason. Also, if something happens down the line (like low refrigerant) there is now way to kick out the compressor to prevent damage.
We should probably have someone with a Factory Service Manual help you chase the A/C circuit out to see whats going on. You can also leave it to the professionals, and they should be able to track it down pretty quick with specialized equipment.
~Randall~
1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place
1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place
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Jrs3800
- Retired Admin/Techinfo Admin
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Re: a/c question
There are too many things that could cause this issue..
Are you applying 12v to the relay? or the pin to the AC Compressor Clutch? The relay supplies power to the AC Clutch via a ground circuit once the ground is applied by the PCM the relay then should pass the 12v current to the AC Clutch..
Also the V5 system is a variable system and will not cycle, it simply will change the piston stroke to accommodate for demand..
I was gonna say you could look at the PCM data and see if the PCM is seeing the AC Request from the head, and also see if the PCM is applying the ground to the AC relay..
Are you applying 12v to the relay? or the pin to the AC Compressor Clutch? The relay supplies power to the AC Clutch via a ground circuit once the ground is applied by the PCM the relay then should pass the 12v current to the AC Clutch..
Also the V5 system is a variable system and will not cycle, it simply will change the piston stroke to accommodate for demand..
I was gonna say you could look at the PCM data and see if the PCM is seeing the AC Request from the head, and also see if the PCM is applying the ground to the AC relay..