Anyone know what the wires on an AC compressor
Apr 16, 2013, 02:56 PM
#1
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Anyone know what the wires on an AC compressor
So trying to diagnose my ac compressor because my AC stopped working a few days ago. I live in hawaii and its pretty hot! Anyway, my clutch stopped moving on my compressor and I just wanted to test if its getting any power. Anyone know what wires are what? I know there are two plugs on them. Heres a pictures
Apr 16, 2013, 03:18 PM
#2
one wire goes to the clutch on the pulley through refrigerant temp sensor its controlled by eng ecu via a/c compessor relay.
basically 12v in through the refrig temp sensor switch if the temp is ok it sends 12v to the clutch which pulls in the electromagnetic clutch then turns the a/c compressor.
check the fuses and then next get the gas checked
basically 12v in through the refrig temp sensor switch if the temp is ok it sends 12v to the clutch which pulls in the electromagnetic clutch then turns the a/c compressor.
check the fuses and then next get the gas checked
Last edited by todd6027; Apr 16, 2013 at 03:25 PM.
Apr 16, 2013, 05:55 PM
#6
If you have 12V on the one-wire connector going to the compressor and the clutch is not engaging, you can only have a bad clutch or an over heat (or indicated overheat) condition in the compressor.
You do not have to worry about charge level or pressure or switch or anything else.... you have 12V on the connector, which means everything else is OK enough to run the pump. If you did not have 12V then you would worry about pressure, relay, etc.
All the clutch needs to turn on is that 12V signal which you have.... it's just a matter of whether or not it is reaching the clutch (since as mentioned it loops through the sensor). Once you determine that you will know whether you need a clutch or a compressor.
Technically you could over heat it if your radiator fan was not working, however realistically the high pressure would cut the power first.
I have been working on these for way longer than I care to remember, and I have never seen a single sensor temp sensor fail on a compressor. I have seen literally a couple over heat conditions, it is rare though. The clutches on the other hand fail a lot.
Edit: if you want to be brutal, take a scotch lock and short the two wires on the compressor together simulating and OK sensor. If the clutch still doesn't engage, the clutch coil is fried.
Regardless of the cause.... it is nearly always cheaper to put a new compressor on aftermarket. They can be had as complete units way cheaper than even just the clutch from Mitsubishi.
You do not have to worry about charge level or pressure or switch or anything else.... you have 12V on the connector, which means everything else is OK enough to run the pump. If you did not have 12V then you would worry about pressure, relay, etc.
All the clutch needs to turn on is that 12V signal which you have.... it's just a matter of whether or not it is reaching the clutch (since as mentioned it loops through the sensor). Once you determine that you will know whether you need a clutch or a compressor.
Technically you could over heat it if your radiator fan was not working, however realistically the high pressure would cut the power first.
I have been working on these for way longer than I care to remember, and I have never seen a single sensor temp sensor fail on a compressor. I have seen literally a couple over heat conditions, it is rare though. The clutches on the other hand fail a lot.
Edit: if you want to be brutal, take a scotch lock and short the two wires on the compressor together simulating and OK sensor. If the clutch still doesn't engage, the clutch coil is fried.
Regardless of the cause.... it is nearly always cheaper to put a new compressor on aftermarket. They can be had as complete units way cheaper than even just the clutch from Mitsubishi.
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