battery downloads on R-19 TD

Finally the fault appeared, they were the heaters, they were connected. Yesterday I started to discharge, I put a bulb, a cable in the heater and another to the dough with the engine stopped and turned on. Therefore the fault must be the heater box, or some of the probes that come to the box from the injection pump or from the engine. At the moment I change the box of heater, where the reverse goes, and to expect that the download does not give again.

Finally appeared .... !! Now the only thing that remains x looks is what is wrong, it is possible the box of heaters or some command relay attached to the box.
A similar problem I had with an Opel Corsa 1.5 D but the battery did not download, what I did was burn heating because it had a bad probe and apart the alternator's loading light did not go out even though the alternator did carry out perféstily.

Anyway, a move, which devanated my brains for many days, I hope you get better than me.

Greetings and luck.

A week since I changed the heating box and I have not downloaded again. will I have been right?

The same is already late to contribute anything to your problem, but in any way "just in case" my opinion goes there:
after reading each and every one of the suggestions that have been made, it seems that "everyone" gives the state of the battery. And possibly your problem is reduced unique and exclusively to that the battery has a short -circuit glass and does not take charge or the one that can take little, it goes in a few hours for that short circuit.
To verify this, what you would have to do is use a densimeter and check the density of the six vessels that make up the 12 V battery. This density must be above 1: 260 in each glass, if not, it would indicate a short circuit in that element and by much ammeter that you put, it will never mark any discharge, since it is being produced through the interior of the battery.
In any case, the symptoms and behavior of your battery are typical of a "short" battery: it quickly carries it, it releases it equally fast, sometimes it occurs, sometimes not, etc.
If you have not taken this into account and you continue with the same battery we are talking about, at any time you can be short -circuit again because it is usually produced by the metal stools that the plates release and that at the time they fall to the bottom of the battery and this can look very mommently.
Have you treated your battery, looking at and filling the level periodically with distilled water? How old is the same? although the latter often does not mean anything.
I hope I have helped you, if not, others.
All the best