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Old 08-09-2016, 11:22 PM   #1
KFS
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Draining battery when plugged in? Help!

Super newbie here. We've owned a new to us 2006 Salem for all of 8 hours and already managed to end up in the dark!

Plugged in and all lights, fridge, slides, etc. worked. 9 hours later husband left lights on the surprise me. Surprise is that micro is on but lights are dead. Will work if plugged into fresh battery.

So common sense says its draining the batteries rather than using electrical.

Feel free to mock us (we are) but what should we look for first. The good news is our neighbor is an RV repairman but I'd rather not become the laughingstock of the neighborhood if we can help it (yet).


Previously owned a 1995 Fifth Wheel. We never bothered to have a battery. This is why we can't have nice things! 😆
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Old 08-10-2016, 05:32 AM   #2
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It the RV's master battery switch was off this would happen. It must be on so that the charger / converter can keep the batteries charged when connected to shore power.

Since you've run your battery all the way down, you should ideally remove it and get it fully charged. Also check its water levels.

I also recommend this good reading!

The 12volt Side of Life (Part 1)
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Old 08-10-2016, 05:44 AM   #3
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Sounds like either the converter breaker is turned off, blown fuse to the battery from the converter (there are two) or the converter is bad.

Easiest way to check is to plug the trailer in to house power, make sure all the breakers in the trailer are on and check the voltage at the battery. Anything under about 13.5 volts DC means no power getting to the battery to charge it up. The fact that the microwave was on and the lights were dead says there is zero output from the converter. So fuses or bad converter or possibly a bad connection. Time for the dealer to step up and fix it ASAP.

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Old 08-10-2016, 07:02 AM   #4
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Quote:
Originally Posted by ilmor View Post
It the RV's master battery switch was off this would happen. It must be on so that the charger / converter can keep the batteries charged when connected to shore power.

Since you've run your battery all the way down, you should ideally remove it and get it fully charged. Also check its water levels.

I also recommend this good reading!

The 12volt Side of Life (Part 1)
that year trailer didn't have a factory battery disconnect switch, unless a previous owner installed one.
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Old 08-10-2016, 07:53 AM   #5
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If the unit had a battery disconnect and it was pulled the lights that are mostly DC powered in most units would not have worked in the first place. Most converters will still produce DC power even without a battery installed. So if no DC power the converter is the problem, check the AC breaker for the converter, also check the 30-40 DC output fuses (reverse polarity). Press the battery test button on the holding tank check panel, if all the lights are lit then the converter is putting out DC if not there is a problem with the converter.
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Old 08-10-2016, 08:48 AM   #6
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She said that it was plugged in and to begin with everything worked. Then later, only the microwave light was on (probably all the 120 volt stuff works).

So here's what I take from it. The battery was good and supplying 12 volt power to the unit. The converter wasn't charging the battery.

Either the converter is bad, or the converter breaker is open (tripped), or there's a loose connection between the converter and battery. There could be a fuse in the line, but most of the time a blown fuse will prevent the battery from powering the RV.

The first thing to check is the converter breaker in the power panel.
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Old 08-10-2016, 02:10 PM   #7
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It appears to have been a fuse.

$1

Appreciate all the input so much! We knew our old unit inside and out. Familiarizing ourselves with this one is a priority and all your assistance is appreciated!
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Old 08-10-2016, 02:32 PM   #8
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Thanks for coming back and letting us know what it was.

I'm glad it was an inexpensive fix at least. Here's hoping all your troubles are as easily and cheaply fixed.
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Old 08-10-2016, 06:15 PM   #9
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Battery

Make sure that your battery disconnect switch is in the on position.
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