A/C suddenly stopped working

Good morning,

The first thing I would do is check the pressures in the system to be sure enough freon is in there to activate the compressor.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

I attached a wiring diagram for the system. There are several fuses that need to be tested. Check them with a test light.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

There is also a pressure sensor that is suspect. You need to verify the reference voltage at the sensor.

Roy

I have checked all pressure switches and all fuses. Looking at the wiring diagram, the clutch relay is the last point before going to the compressor. There is voltage at all points on the relay. If I try to bypass the relay, fuse 11 blows.

How do you check the A/C compressor diode?

Use an ohmmeter. You should have continuity in one direction only. The other will show OL.

Did you jump 3 and 5 in the diagram? If you did and the fuse fails, then disconnect the compressor clutch and try again.

Roy

Does it matter which way the diode is intalled?

Yes. It must be installed as shown in the fuse box diagram.

Roy

I have power at the connector of the compressor clutch. 12v using the positive and negative of the connector. Is it the compressor clutch?

That is correct. You need a compressor.

https://www.2carpros.com/articles/replace-air-conditioner-compressor

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Roy

The entire compressor or the clutch coil?

I would replace the entire compressor.

Roy