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Old 04-02-2004, 10:29 AM   #1
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2002 25' Classic
Oro Valley , Arizona
Join Date: Oct 2002
Posts: 835
TV connected & on shore power?

Is there anything "wrong" with my leaving the 12V hooked up to the tow vehicle when I do not unhitch and connect to shore power for an overnighter?

Not that I'm lazy or anything.

Kistler & Brenda

2002 Classic 25'
2003 Expedition EB 5.4L, AWD, AdvanceTrac Class IV hitch pkg. Reese dual cam/Prodigy
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Old 04-02-2004, 10:36 AM   #2
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1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
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I don't think so. the univolt would actually charge up your tow vehicles' battery in that configuration.

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Old 04-02-2004, 12:10 PM   #3
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2005 28' Classic
Austin (Hays County) , Texas
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I see no problem.

I usually leave mine hooked up overnight. I have never ran into a problem in 15 years of doing so. That way, I don't forget to plug it in during some of my early-morning departures.
John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2013 Silverado 2500HD Duramax/Allison LTZ
WBCCI #9632, TAC TX-10
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Old 04-02-2004, 03:27 PM   #4
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2001 34' Limited
The State of , Ohio
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If your Expedition is anything like the bigger Ford trucks, there's a relay that connects the truck alternator and battery to the trailer 12V circuit when the ignition key is in the "Run" position, and disconnects it when it's in any other position, including Off with the key removed. This keeps the trailer from draining the truck battery (and also keeps the converter from charging the truck battery).
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Old 04-03-2004, 05:12 AM   #5
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1972 31' Sovereign
High Springs , Florida
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My 2000 GMC 3500 had dual batteries, and the relay that Moe speaks of. It kept the aux battery connected to the trailer at all times, but isolated the main battery from the trailer. Not sure how the diesel is as I believe it uses both batteries for starting. I'll have to throw a VM on that pin of the rear connector and find out.
2003 GMC 2500HD 4X4 D/A Ext. Cab
Propane Powered Honda EU2000i
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