Excessive electrical consumption

Hello everyone, I would like to know if you can help me in a breakdown that I have in my car is a tdi 2.0 of 115cv of the year 2001 and it has an electrical problem when I connect the air conditioning the load of the alternator goes down to about 12v we are absolute that the alternator load is absolute The same thing has happened to someone or who knows me or who knows someone who has happened to him and you can help me greeting and thank you for attending me.

Your problem should be the Czech alternator regulator the load with the car on without turning on any compounds and then Check

It can also be a battery theme, leave the lights high on 15 minutes and look if the tension in the battery falls, if so it is because truly the battery will not be more

Good compi, because it gives me the impression that the electro magnet of the air conditioning pulley is short. To be sure, turn on the motor of the car with the air on and check that the input cable to the air compressor pulley does not rehend, if so, the paste you have on the pulley. greetings