1974 Westy ac/dcfridge 12v issue


New member
I just recently purchased a 1974 westy and fridge works great on 110v....has controls on side of fridge I'm unfamiliar with. Has a toggle switch labeled 110v on bottom and 12v on top....toggle will not stay in 12v position. Also has small black toggle next to standard toggle which I don't know what it is for....also has red knob which I believe is thermostat knob....any help on what smaller black toggle is for
and why standard toggle will not stay on 12v mode would be appreciated