battery voltage dropping

[Colorado Camper]

We have just started out fulltiming in our 2009 North Trail 21FBS.

I noticed that since we have been camping here (3 days) the battery voltage is slowly dropping.
It was at 13.6 when we arrived, but now is down to 12.94 V

Have been plugged into good AC all the time.

Batts are original (5+ years old).

Cant recall hearing converter hum last couple of days, so that's a concern.

Where do I start checking? Batt are OK on water.

I am going to replace batts next week due to age, how do I check converter?

Dick

 

[danemayer]

Hi Dick,

We have a 12V Block Diagram and Diagnostic Guide that can help. There's a 12V mini-breaker near your battery that may have tripped. The guide explains and has drawings and pictures. If that's not it, there's a diagnostic flowchart to step you through what to check.

 

[Colorado Camper]

Thanks for the link, very useful article.

I was looking at the breaker/fuse panel in the rig. Just for the heck of it , I cycled the AC breaker feeding the converter.

Now, it is back to 13.5 V range output as read by my DVM.

Not sure what happened , looks like it reset it self. So far, so good.

Dick

 

[danemayer]

Thanks for the link, very useful article.

I was looking at the breaker/fuse panel in the rig. Just for the heck of it , I cycled the AC breaker feeding the converter.

Now, it is back to 13.5 V range output as read by my DVM.

Not sure what happened , looks like it reset it self. So far, so good.

Dick

It can be hard to tell if the circuit breakers in the RV have tripped. At home, if a breaker trips, it's visually obvious. In the RV, not so much. Also, on most RVs the panel is at ground level and hard to see. I can usually run my finger along the bottom edge of the breakers to find a tripped breaker, but even that isn't 100%. Sometimes you just have to turn them off and on to make sure.