How to check on the "short" air conditioning compressor in Xsara Picas

Hello.
How do you check the compressor from the air conditioning in Xsara Picasso 1.8 2002 for a short time?
I can not hear "barking", the climate does not cool (again ). I do not see the fan or compressor "years" especially ..
Some time ago I was replacing the ignition switch, not the original one.

I'm just interested in where to hook up with the voltage to check if the compressor is alive, or to measure if it "gets" voltage.
The air conditioning service does not interest me - so far I have not come across a particularly good one, unfortunately ...

For those interested - both hot tubes, from low and high pressure. I will check if something is on the valves ...

If there is no factor, it will not get tension. The voltage can be supplied to the compressor's electromagnetic coupling. It's best to connect the clocks and check the pressure, you have to start with it.

I do not have clocks. I check for "trick" in ports. The compressor has to move for a moment. Then I will know something. The vacuum was checked, it was 20 minutes. It persisted.

Now what do you have in the system? Vacuum or factor?

Both valves have done "trick" meaning there is a factor there. The belt is spinning, but I did not see if the clutch moved and turned the compressor. After a while, both hot tubes.
As he has been psyched something this factor must be. The question is, how many gauges are bowing.

If I turn off the air conditioning, the tubes do not heat up.

Further information after the observation: on the route, the climate turned on when set to the lowest value, i.e. 14 degrees. She blew colder air, but without exaggeration. So the compressor works. If I have a thermometer, I will measure it, because recently it pointed me to +45 crazy degrees ..

In the end I checked the climate for "short".
Plug in the connector secured with a wire - you have to be careful, because when moving away, the protection has a tendency to run across the engine's space.

The plug is rectangular, after removing the protection it comes out slightly. They are clearly marked with numbers on the pins - you can not go wrong.
I stuck 1 and 4. After a few seconds I heard a pop (compressor), the engine's revs went up. It's hard to say whether it blew cold, but the compressor works ... So you may actually be missing the factor. I also read that maybe the hiss that comes out when the compressor is running can be caused by a small amount of refrigerant and the expansion valve gives such noises. Oh, on pin 1 when we connect an incandescent bulb and with the other end of the probe, we touch the bulb in the probe until it lights up.

The car last year had a supplemented factor, the vacuum before checking was checked and it was ok after 20 minutes. That's why I was making fun. I have also heard various legends about the time the vacuum is to be maintained.

The most important - efficient compressor. At least I hope she survived my experiments.

I will add more after the battles ...

I gave up. I ride on an empty climate.