2012 Lacrosse AC clutch not engaging

[Alacran]

Hello Buick forum,
I have 2012 Lacrosse with the AC clutch not engaging. High side sensor and low side gauge read around 130 psi. I scanned for fault codes with Autel MX808. Also, I tried jumping the clutch relay and nothing happened. The relay clicks and I can move the clutch. Is there something I am missing?

EDIT: I have 12v power on cavity 2 at the compressor.

TIA
Nic

 

[Tcapper]

Hi, I have the same problem with my son's car. Albeit, it's not a Buick. With the clutch not engaging, I disconnected the electrical connector from the clutch assembly and used a multi meter. His clutch is showing no resistance which means the clutch coil is open. Using a multi meter across the pins on the A/C compressor, the A/C clutch coil should have a very low resistance. EG: 2-10 ohms. I would start there.

 

[Alacran]

Clutch is dead…I measured OL f for resistance and plugged 12v directly into it.

 

[richardnewton]

Do they sell coil-clutch repair kits?

 

[Smith1000]

Did you also check the ground by running an alligator clip wire to the battery negative from the ground terminal? If not, might be worth checking as well.

 

[Alacran]

I replaced the AC compressor with GM part 19419921. Everything works now. The clutch coil failed internally. There is no damage to the wires at all.

All set.

 

[Alacran]

Coil removed…see picture

 

[Alacran]

Coil picture two

 

[richardnewton]

Thanks for the follow up. I suppose the cracks around the perimeter are potential clues.

On a different GM car we had the clutch fail and the meachanic swapped in a Nissens compressor. That compressor was noisy, was not very cool, lasted 2 years. Last autumn, a better mechanic replaced it with a GM part which is much quieter and cooler than the Nissens was.