Thank you very much Eldevictrus! I will try this, before removing the positive term of the positive, as I commented podos71, if with any of the fuses that consumption lowers (which will have to check it with the van off, right?), It will be what it comments on podas71, it will be a problem of the alternator and its diode plate ... ???
Thank you very much again, this weekend I will try to do it.