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Old 01-18-2009, 08:44 PM   #1
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Rivet 12V From Truck

does the battery in the coach get charged or supposed to get charged form the tv when connected/?
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Old 01-18-2009, 08:47 PM   #2
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yes!

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Old 01-18-2009, 09:05 PM   #3
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does the battery in the coach get charged or supposed to get charged form the tv when connected/?
But basically, to become fully charged, the engine must be running at something other than idle.

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Old 01-18-2009, 09:12 PM   #4
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It should. But it isn't the fastest charge you'll ever see. It's a long wire run and (at least in my truck) there is not a whole lot of alternator capacity left over after all the gadgets are running (GPS/Sirius/Celly...).

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Old 01-18-2009, 09:18 PM   #5
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If you stay hitched up overnight it would be wise to disconnect the umbilical. There's supposed to be a diode in modern tow vehicles which prevents your coach drawing overnight from the truck batteries if you don't have a 120V hookup. I just disconnect as a matter of caution.

Due to the marginal ability of alternators to do much more than cover tow vehicle needs and the distance back to your converter & battery, the ability of the tow vehicle to top off your battery is very limited and may take several hundred miles of driving to do this. I would reference posts by roadkingmoe and 2airishuman on this topic but that's a difficult search. I just don't rely on it ... again, as a matter of prudence.

Discharging a battery below 50% will shorten its lifetime.
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Old 01-18-2009, 09:22 PM   #6
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Make sure all your fuses in the 12 volt electrical panel are good...and if you have any circuit breakers, check them also, to make sure they are still good...

You can 'test' to see if you are getting 12 volt charging voltage by:
1. with a Dc voltmeter (digital is preferred) check the voltage across the battery terminals - at the battery - with the TV engine NOT running - note the voltage.

2. fire up the TV and again check the voltage at the trailer's battery...see if the voltage has risen from the previous reading...you'll need about 13.7 volts to get any meaningful 'charge' from the TV.
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Old 01-18-2009, 09:22 PM   #7
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If you stay hitched up overnight it would be wise to disconnect the umbilical. There's supposed to be a diode in modern tow vehicles which prevents your coach drawing overnight from the truck batteries if you don't have a 120V hookup. I just disconnect as a matter of caution.

Due to the marginal ability of alternators to do much more than cover tow vehicle needs and the distance back to your converter & battery, the ability of the tow vehicle to top off your battery is very limited and may take several hundred miles of driving to do this. I would reference posts by roadkingmoe and 2airishuman on this topic but that's a difficult search. I just don't rely on it ... again, as a matter of prudence.

Discharging a battery below 50% will shorten its lifetime.
For sure and yep, guaranteed.

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Old 01-19-2009, 01:31 PM   #8
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Ok So I have a problem! Does any one have a wire diagram for the plug on the AS?
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Old 01-19-2009, 02:09 PM   #9
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Shermantic, try this. It should take you right to 7 pin plug and receptacle. If you have a 4 pin, this site may have that too.

Marksrv.com 7 way wiring diagram page


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Old 01-20-2009, 01:31 AM   #10
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Check your fuses.

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Ok So I have a problem! Does any one have a wire diagram for the plug on the AS?
Hi, check your fuses, some GM products have a dummy fuse in the fuse panel for your charge wire.
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