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Old 10-13-2006, 03:50 PM   #1
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1975 29' Ambassador
Monkton , Maryland
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Brand new battery dead in 5 days of use...

Got my brand 'new' (to me) 1975 Ambassador sitting on my driveway with 110V connected. The battery condition on the panel has shown 'average' at best. The voltage at the battery (when connected) showed 12.7 V.
Ater 4 days I notice that the overhead/exterior lights no longer work. None of the fuses were blown, and the voltage at the battery is 0V.

It appears that the charger is not working, anything I should check?

What is going on, I am at a loss...

Thanks in advance.

Robert
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Old 10-13-2006, 05:00 PM   #2
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If the trailer is plugged in 110 and you only have 12.7 volts then the converter is not putting out. It should be around 14 V.
Check the Converter breaker/fuse and the output of the converter. It should be fused as well. If both are ok then it is shot.
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Old 10-13-2006, 07:58 PM   #3
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You may have a switch to turn off the converter (OEM was known as a Univolt), to keep the loud HUMMMMM from driving you insane while trying to sleep. It could be simply turned off. Try plugging in the trailer, and turning on all switches while watching your battery condition meter. If it suddenly comes to life, you have found your problem.
If not, there is a 50 amp + fuse as well as a 50 amp - fuse (to ground). If either of these are blown, you will have no joy with the converter.
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Old 10-13-2006, 08:26 PM   #4
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Also , check for a line fuse right at the the battery cable where the hot line connects to the batery - our 71 has a fuse there too.
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Old 10-14-2006, 05:45 PM   #5
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1975 29' Ambassador
Monkton , Maryland
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Problem diagnosed: convertor!

Nothing from the convertor, so that was easy to find.

This trailer is permanently attached to 110V, do I really need to replace the convertor? None of the 12V lights work, but other than that is seems fully functional.

Any suggestions?

Robert
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Old 10-14-2006, 09:05 PM   #6
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1993 21' Sovereign
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Quote:
Originally Posted by wavemaster
Nothing from the convertor, so that was easy to find.

This trailer is permanently attached to 110V, do I really need to replace the convertor? None of the 12V lights work, but other than that is seems fully functional.

Any suggestions?

Robert
Since almost everything is designed to work with 12 volts, you will need to replace the converter. I would put an on-off switch to it, if you aren't going to be in the coach for a week at a time, you can switch it off. If you don't have an LP detector, or CO detector, the battery won't go dead in a week. It will save your electric bill as well as allowing the new converter to last longer.
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