Power Light while on DC power

Mjlrpod...you got it right thanks mucho...I pulled the plate from the wall then did as you said. The little red light goes off and on but the tv stays the same...no effect on the channel. Then I removed the grey cable and no tv action no channel and the red light on the booster was out. So the cable for the tv runs in the overhead across the bathroom to the front bed wall area. At least I solved that problem. So now I need to replace satellite/tv switch. Any thoughts...thanks so much for the help👍👍

Not sure why I have a battery drain with everything off...I just put main battery cut off... any other insights most appreciated

Thanks.. put a disconnect switch on the negative battery terminal. Didn’t even think of the other transient pulls mentioned...thanks!

On RVs I use the negative. On motorized vehicles I will use either, the Old NHRA rules said it had to be on positive side. Half a dozen of one and 6 of the other.

No, disconnects, fuses, and circuit breakers should always go on the ungrounded conductors of any electrical system, never on the neutral (grounded) conductors. For 12Vdc systems that means the positive conductor get the fuses and disconnects. That is an National Electric Code requirement, which does apply to RVs. The reason is that if you disconnect the negative at the battery the whole negative side of the 12v circuit can be hot afterwards. Basically, you should wire up 12Vac systems just as you would a 120Vac system.

I think the confusion comes from the recommendation to disconnect the negative first when replacing or otherwise maintaining a battery. That is not inconsistent, once you lift the battery negative conductor you should also remove the positive.