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Old 11-22-2013, 08:05 PM   #11
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It's a brand new coach, 2014 that I picked up in July. Nothing was left on either so it's a little weird
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Old 11-22-2013, 08:09 PM   #12
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With a completely dead chassis battery there is a lot of current being drawn from the house batteries when you use the aux start or use jumpers. That's why you fried your cables. You really need to charge your chassis battery for a while before even trying to start the engine. That dead battery is probably loading down the house batteries and then trying to start the engine only drops the voltage further. If you're not in a hurry, put a battery charger on the chassis battery and see if it will take a charge. Or swap out one of the house batteries for the chassis battery and charge the chassis battery with the converter
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Old 11-22-2013, 08:20 PM   #13
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With a completely dead chassis battery there is a lot of current being drawn from the house batteries when you use the aux start or use jumpers. That's why you fried your cables. You really need to charge your chassis battery for a while before even trying to start the engine. That dead battery is probably loading down the house batteries and then trying to start the engine only drops the voltage further. If you're not in a hurry, put a battery charger on the chassis battery and see if it will take a charge. Or swap out one of the house batteries for the chassis battery and charge the chassis battery with the converter
Can I swap them? Think the house batteries are 6volt and chassis 12.... Not sure if I an do that. Going to ask some buddies and see if they have a charger and try that
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Old 11-22-2013, 08:31 PM   #14
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Sorry, I didn't realize that the house batteries were 6 volt. Guess that wouldn't work too well. I sure would like to know what caused the chassis battery to get completely drained like that. I guess it's possible that you have a bad cell but you will find out soon enough when you try to charge it.
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Old 11-22-2013, 08:46 PM   #15
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House batteries are 6volt while chassis is 12 volt, don't try to swap them. I carry a small battery charger with us when we travel, recommend you get one also, really helps when I leave the key on in the toad. Also, don't you have coachnet since you have a new unit? Would call them and let them help you. Also on the aux start, you need to hold it down for it to work.
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Old 11-22-2013, 08:59 PM   #16
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House batteries are 6volt while chassis is 12 volt, don't try to swap them. I carry a small battery charger with us when we travel, recommend you get one also, really helps when I leave the key on in the toad. Also, don't you have coachnet since you have a new unit? Would call them and let them help you. Also on the aux start, you need to hold it down for it to work.
Held it in and the light on the aux switch light was very very dim and I got nothing on my dash lights with the key on.... When the jumper cables
We're first attached, all lights
Came on until the cables fried...
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Old 11-22-2013, 09:33 PM   #17
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I'm an very dedicated DIY guy, but with your problem it sounds serious enough that I'd consult a professional. Especially being under warranty.

If you're frying jumper cables, the next thing to go could be the entire coach!!!

3.6 Volts is BEYOND dead on a 12 V battery. It would not surprise me to find the batt(s) permanently damaged and will no longer accept a charge at all.

Just my $.02 worth

Boowho??
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Old 11-24-2013, 08:57 AM   #18
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Any updates on this? I'm very curious to find out what the problem is.
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Old 11-24-2013, 09:20 AM   #19
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Fried jumper cables?

You need to find out why ASAP!
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Old 11-24-2013, 10:33 AM   #20
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Not sure why the cables fried... They weren't the best set and they weren't heavy duty cables. I bought a battery charger yesterday and charged them back up and the coach started right up. Going to check the voltage in a little while to see if they held a charge or not. If they did, I'm assuming I left something on to drain them. If not then I'll be taking it to freight liner for some new batteries.
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