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10-25-2008, 01:28 PM
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#1
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Rivet Master 
2008 30' Classic S/O
Dearborn
, Michigan
Join Date: Aug 2006
Posts: 1,403
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umbilical and kill switch
why am I registering 12.6v at the a/s umbilical when the kill switch is 'off'?
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10-25-2008, 02:12 PM
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#2
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Rivet Master
1971 25' Tradewind
1993 34' Excella
Currently Looking...
Estancia
, New Mexico
Join Date: Feb 2005
Posts: 7,743
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I don't know anything about new Airstreams but in older Airstreams the umbilical wiring is independant of the rest of the trailer and runs off the TV except for the breakaway switch connection.
__________________
Sail on silver girl. Sail on by. Your time has come to shine.
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10-25-2008, 02:55 PM
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#3
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Rivet Master
2008 30' Classic S/O
Dearborn
, Michigan
Join Date: Aug 2006
Posts: 1,403
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my trimetric reads -.05 everything off. -.09 everything off, my TV plugged in and running... a voltmeter shows 12.6 at the 7-way on the TV...
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10-25-2008, 03:10 PM
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#4
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Rivet Master
1967 26' Overlander
Huntsville
, Alabama
Join Date: Dec 2003
Posts: 3,018
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Is there a problem?
Joe,
If there is a battery installed in your Airstream, there will be battery voltage available at the "charge" wire on the umbilical for you to read.
Is there a particular issue that prompted you to measure voltage on each of the seven wires?
Tom
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10-25-2008, 03:12 PM
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#5
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Rivet Master
1967 26' Overlander
Huntsville
, Alabama
Join Date: Dec 2003
Posts: 3,018
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Quote:
Originally Posted by finalcutjoe
...TV plugged in and running... a voltmeter shows 12.6 at the 7-way on the TV...
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The TV is trying to charge your Airstream's battery.
Tom
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10-25-2008, 03:13 PM
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#6
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Rivet Master
2008 30' Classic S/O
Dearborn
, Michigan
Join Date: Aug 2006
Posts: 1,403
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yeah... the trimetric is reading -.05 everything off and -.09 with the suburban plugged in and running...
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10-25-2008, 03:24 PM
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#7
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Joe,
What's the reading at the TV battery, was it running?, 12.6 seems a little low.
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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10-25-2008, 03:32 PM
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#8
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Rivet Master
2005 39' Land Yacht 390 XL 396
Common Sense
, Texas
Join Date: Sep 2007
Posts: 5,319
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Quote:
Originally Posted by finalcutjoe
why am I registering 12.6v at the a/s umbilical when the kill switch is 'off'?
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I think the kill switch is between the battery and the trailer system (load), but the battery stays connected to the converter and the umbilical.
__________________
Regards,
Steve
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10-25-2008, 03:49 PM
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#9
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Rivet Master
2008 30' Classic S/O
Dearborn
, Michigan
Join Date: Aug 2006
Posts: 1,403
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yup... 12.6 while the burb was running... I figured if I plugged in the TV, running, I would show charge on the Trimetric... instead I show a draw of an extra ~40mA... not only is there supposed to be an isolator.. but there should be charge, right?
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10-25-2008, 04:05 PM
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#10
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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All I know for sure Joe is when I'm plugged in and running, the voltage in the trailer and TV are the same, 13.9v. What reading do you get in the Burb with trlr disconnected?
__________________
I’m done with ‘adulting’…Let’s go find Bigfoot.
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