Fleetwood calls the lockout switchs: main and aux connect/disconnect. the 2 switches control 2 relays in the BCC. When you connect both the main and aux, all power to the coach should be there.
Main connect/ disconnect relay controls: slide out F20 (15amp),Horn/jacks F10(15a) and others.
1. Try your horn and your steps(in/out), if they work the main is connected
the aux connect / disconnect control radio,luggage light , converter and dc dist panel.
2. try your radio, luggage lights,water pump i they work your aux is
connected.
3. do you have a aux start switch on your dash ? When held down the sw. should connect the main and aux battery together using a relay in the BCC .
2016 Winnebago 35B v10
2006 Jeep Liberty 4x4
Blue ox Tow Bar