I was wondering if anyone has ever had the problem of when on generator and having the 12v cabin lights on....they start to go on & off. Also, when I am plugged into the house sometimes they do that too....all the other flourescents and such work fine....just the row of 12v that I have going down the center of the Barth interior. Strange and probably something simple I have done. Thanks Gorman

The on/off sounds like a loose connection of some sort. I usually start by bumping, pulling, slapping, jumping and otherwise try to make something move in the circuit. The switch could have a loose connection on the back or be defective. Think of it as the same when you are trying to get the string of Xmas tree lights working and it turns out to be a loose bulb some place in the string. If it happens with any AC source of power it has nothing to do with the AC source of power. It is a DC problem. My center lights would work and then not work but they would pop the circuit breaker. Found a broken wire, fixed that and all is OK.

Is there an automatic reset circuit breaker feeding them?

They will do that.

Does it do that when just one of the lights is on or only when they are all on?

Find the circuit and get some amp readings.