I've always wanted to have no ignition. For example, in the Skoda company I have a radio without a key that plays for an hour then turns off. The cable from which I led the current to No. 16 is the cable with the largest cross-section and as the only one has voltage without a key.
Thanks mate DriverMSG the problem was solved and the changer works and also remembers stations without backlighting the light switch.
For posterity ....
In general, the whole "factory improvement" was that:
- cut the wire from pin No. 16 - we make a "bypass" (we plug in wire No. 4 of the lower cube - solid 12v) to wire No. 16. - we insert two rectifier diodes (1A is enough) according to the attached picture.
All in all, the main reason for the proper operation of the changer, but the lighting switch was lit, was that the current, apart from the changer, was also going to the radio. After blocking the power diode, everything works as it should.