1983 c30 A/C Compressor Clutch

[biggfrank99]

I would still guess it is electrical though. What compressor do you have? R4 or A6?

 

[biggfrank99]

It’s an hr6 compressor

 

[biggfrank99]

That's pretty low. What was the high side pressure at? You replaced the orifice tube when you did the conversion? My high pressure port is AFTER the condenser. If yours is also, you could have a clogged condenser causing this and it wouldn't show up on the gauge. Mine reads well under the max low side pressure even with a full charge.

The entire system was new. New evaporator core new condenser new compressor and new accumulator new orifice tube. Lines flushed with ac cleaner solvent and blown out with dried and filtered air. I don’t remember exactly what the low pressure was but everything was in spec

 

[biggfrank99]

Hr6 compressor

 

[Bextreme04]

Hr6 compressor

Since you upgraded the compressor and have an all new system, I am even more convinced its electrical. Since you have the two pin plug on it now, I would take the original single power wire coming from the low pressure switch running to the compressor and use that to power a relay. Run the other pin with a 12 gauge wire all the way to a very solid ground location. You can very easily do it in such a way that you shouldn't even need to modify the stock harness, just create a plug in to the original harness.

Less than $20 on scamazon and you can have an additional 4 fused circuits and two individually controlled fused relay outputs in a waterproof box. Run the green AC clutch wire to the gray wire on the wire bundle, Yellow wire to the clutch, red to battery positive, black to frame or battery negative. Large 10 gauge ground wire from the AC clutch to frame ground or battery negative.
https://www.amazon.com/dp/B0DDWYT8JL/

 

[biggfrank99]

Since you upgraded the compressor and have an all new system, I am even more convinced its electrical. Since you have the two pin plug on it now, I would take the original single power wire coming from the low pressure switch running to the compressor and use that to power a relay. Run the other pin with a 12 gauge wire all the way to a very solid ground location. You can very easily do it in such a way that you shouldn't even need to modify the stock harness, just create a plug in to the original harness.

Less than $20 on scamazon and you can have an additional 4 fused circuits and two individually controlled fused relay outputs in a waterproof box. Run the green AC clutch wire to the gray wire on the wire bundle, Yellow wire to the clutch, red to battery positive, black to frame or battery negative. Large 10 gauge ground wire from the AC clutch to frame ground or battery negative.
https://www.amazon.com/dp/B0DDWYT8JL/

Thanks a lot. I’m definitely gonna try this. Will keep you guys posted.

 

[biggfrank99]

Update guys. I was only getting 6vdc to my compressor. Had two bad grounds to fix. I am now getting 12.9 volts to the compressor and have been ice cold for almost two weeks now.