A steady plus connection can be established via contact number 9 of the 13-pin connector according to ISO 11446. This contact is primarily used to feed the refrigerator or interior lighting of caravans.

The connecting cable to contact number 9 and the respective common return to contact number 13 should have a diameter of 2.5 mm2 and a fuse protection of 20 A at most.

Advice:

According to the ISO 11446 standard, the common return contacts number 3, 11, and 13 must not be connected electrically conductive.