12v Constant DRAW

[honestbest333]

Hi guys,

I have something 12v draining my batteries overnight. I have everything shut off on the camper, and it still drains them over night. Just put in new batteries as well. Still drains them.

How do I start trouble shoothing this 12v electrical system to see what is causing the drain?

[CA_Traveler]

BTW Some of my battery loads cannot be turned off per mfg design. A switch on the battery terminal solved that problem.

[fitznj]

Remove all 12v fuses from the distribution panel;
Take a multi-meter and put in the mode where you can see if
a circuit is drawing a current (usually no more than 10A);
Test each fuse and find out which circuit is drawing the current.

Now trace back to the appliance; I had the same issue and it turned out
to be the smake/CO2 detector and the fridge (even if it was off);

My batteries would drain in < 2 days;

Also - good point about the break away switch

[CA_Traveler]

A DC clamp on ammeter is a very useful RV tool.

[BFL13]

If your "camper" is a trailer, check that the emergency breakaway switch plug has not been pulled out. If it has, plug it back in (needs to be turned just right so it goes back in).

[1995brave]

Make, model, and type of RV would really help zeroing in on your problem.

[LittleBill]

removes fuses from the distribution panel one at a time till the draw stops,

if that doesn't work, start removing wires at the battery one at a time.