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Old 06-21-2009, 01:28 PM   #1
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Mt. Angel , Oregon
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Newcomer needing help

I just picked up a 1974 20' Coachman travel trailer and i am kinda baffled. When i have the 110 plugged in i have 12v lighting and other 12v functions, but when i unplug the power cord it should run these things off of the 12v battery, correct?? I have no 12v from the battery. Battery is charged and yet no functions. Can anyone please shed some light??

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Old 06-21-2009, 01:44 PM   #2
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1962 24' Tradewind
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Fuses? Corroded connections?


TV1: Black Sheep, 2001 Dodge 3500, 800,xxx miles, a few non-stock parts here and there...
TV2: Brownie, 1989 Dodge W250, only 256,000 miles!
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Old 06-21-2009, 05:06 PM   #3
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Hi Dman...

We're mostly about all things Airstream here, but electrical problems are pretty common ground among all trailers... sounds to me that since all your 12v systems are working with the converter, you've probably got a ground issue for your 12v battery... less likely would be the positive side. 99.5% of all 12v problems are ground-related. The other .5% are ground related too.

It could be corrosion, bad connections, bad cables... even a fuse or fusible link... just get out your 12v VOM and start tracing!

Good luck figuring this out!

AIR 2053 Current: 2006 Born Free 32 RQ Kodiak Chassis, & 1995 Coachmen B-van
Former Airstreams: 1953 Flying Cloud, 1957 Overlander, 1961 Bambi, 1970 Safari Special, 1978 Argosy Minuet, 1985 325 Moho, 1994 Limited 34' Two-door, 1994 B190 "B-Van"
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Old 06-21-2009, 06:00 PM   #4
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What about when you have it hooked up to the TV do you have power then? It is not a solution but may help you narrow down the problem. The TV should give the lights juice under 12V. Maybe the battery is not connected to the converter?
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