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Old 08-21-2015, 05:15 PM   #11
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I probably should have specified, mine is a 2013. So if my ignition is on accessory, Am I using my chassis battery? Would be really weak of there is no way for me to use that stereo for TV sound without killing my battery as the TV has the weakest volume I have ever heard.

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As was mentioned earlier the radios have been wired differently depending on the manufacture dates. I have a 2012 and the radio was wired to use the chassis battery and required the ignition to be "on" or "accessory". I believe FR determined how stupid that was and sometime during the 2013 model year run the radio was changed to be powered by the coach battery. The other reason that was bad is the chassis battery is not made to deep cycle (which will quickly shorten it's life) like the coach battery system.
I revised my wiring and installed a selector switch on the dash so I can power my radio from either battery system which I would recommend you do. End answer is "Yes" you will be depleting your chassis battery unless you are plugged in to shore power or operating the generator, either mode will keep both battery systems changed.
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Old 08-21-2015, 05:54 PM   #12
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We have a 2013 3170 and can run front radio and DVDs on coach batteries with ignition off.


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Old 08-21-2015, 09:39 PM   #13
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My 2012 can run off either battery. FR added a little circuit in the power line to the radio that switches power. When chassis power is present (key in on or accessory) it provides power to the radio. When key is off, coach provides power (assuming the battery disconnect is in the on position). The circuit (I assume probably some diodes) is covered with a bundle of tape right behind the radio.


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Old 08-21-2015, 11:25 PM   #14
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Originally Posted by ATVer View Post
As was mentioned earlier the radios have been wired differently depending on the manufacture dates. I have a 2012 and the radio was wired to use the chassis battery and required the ignition to be "on" or "accessory". I believe FR determined how stupid that was and sometime during the 2013 model year run the radio was changed to be powered by the coach battery. The other reason that was bad is the chassis battery is not made to deep cycle (which will quickly shorten it's life) like the coach battery system.
I revised my wiring and installed a selector switch on the dash so I can power my radio from either battery system which I would recommend you do. End answer is "Yes" you will be depleting your chassis battery unless you are plugged in to shore power or operating the generator, either mode will keep both battery systems changed.
Where did you pull the coach power wire from? Can I grab that from the seat switch?
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Old 08-24-2015, 04:38 PM   #15
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Where did you pull the coach power wire from? Can I grab that from the seat switch?
I brought a wire down from the 12v power port for the TV. It runs down under the panel behind the seat, under the door step panel, then up behind the kick panel to the dash and over to a rocker selector switch I added in the blank spot next to the dash power port.

I believe the switch under the seat for connecting the batteries together just operates a relay to do the connection. If the relay power comes from the coach batteries it seems possible you could connect there. If you disconnect the chassis battery and there is still power at the switch then you should be able to use it. Don't know what amperage the circuit is fused for but it probably would be enough to power the radio if the radio doesn't have a high power amp.
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