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Old 08-28-2012, 05:37 PM   #1
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2009 25' FB Flying Cloud
Portsmouth , Rhode Island
Join Date: Sep 2010
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Dimmed interior lights when on 110

2009 Flying Cloud 25FB - recently, interior lights seem dimmer when powered by 110V. Any way to check on this?



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Old 08-28-2012, 06:12 PM   #2
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1967 24' Tradewind
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Well, they are still powered by 12V even when you are plugged in. Seems unlikely unless your converter is not working and the battery was going down.

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Old 08-28-2012, 06:38 PM   #3
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2008 27' Classic FB
Burkburnett , Texas
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A fully charged standard battery is 12.7 volts and typically a few 10ths less under load. When the trailer is plugged in and the converter is operating, the 12 volt circuits will generally see between 13.2 and 14.4 volts depending on the converter's charge mode. So one would expect to see slightly brighter bulbs when plugged in. Perception of brightness can be subjective, so to better understand what is really going on, an inexpensive digital volt meter could be useful to determine if the voltage is really where it should be.

You could measure the 12 volts either at fuses, at one of the 12 volt outlets, or directly off the battery posts.
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Old 08-28-2012, 06:43 PM   #4
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1977 31' Sovereign
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Testing voltage

Since the lights on your year Airstream are 12 volt DC you will need to test the voltage with a meter when on straight battery and when plugged into 110. You can test that either at the light outlet or easier at the cigarette lighter type outlets. It could be that the output of the converter is low.
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