Volt Gauge not working properly

[LJ-TJ]

So! 1975 Winnebago Volt gauge. When I turn the key on nothing happens. Once I start it nothing happens. When I hit the battery condition main switch it shows 14 volts, when I hit the Aux battery side of the switch nothing happens. On the old crispy bago when you started it and ran it, it would show a charge. When you put on the lights it would show a small drop in charge. Any thoughts on what might be happening on the new winnie.  Hm?

[ClydesdaleKevin]

Same thing happened on our 77 Itasca...exactly the same.  I never did sort it out before Mark bought it. 

Kev

[DaveVA78Chieftain]

On my 78 the switch is a ON/OFF/ON switch so, you have to select the battery to monitor first.  Does not default to chassis battery.   Sounds like you have a wire dissconnected to the coach battery side.

Dave