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Old 07-19-2007, 05:06 PM   #1
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hi ALl....I have a 2005 Allegro Bus that I bought used in January with 13K miles. After being plugged in for at least 10 days the batteries go dead and I can't start the coach. To use the transfer from the coach batteries requires a ten minute hold before I get enough juice to start.

I can't believe that the batteries are shot. ANybody run into this??

Thanks in advance....Enjoy your adventures...Fritz
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Old 07-19-2007, 05:06 PM   #2
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hi ALl....I have a 2005 Allegro Bus that I bought used in January with 13K miles. After being plugged in for at least 10 days the batteries go dead and I can't start the coach. To use the transfer from the coach batteries requires a ten minute hold before I get enough juice to start.

I can't believe that the batteries are shot. ANybody run into this??

Thanks in advance....Enjoy your adventures...Fritz
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Old 07-19-2007, 06:22 PM   #3
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When you say "plugged in" I assume you mean plugged into shore power (120VAC). If that's the case, it appears that your power converter is not charging the batteries. Either that, or its working too well, and has boiled the batteries dry. Have you checked the fluid levels in the batteries?
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Old 07-19-2007, 08:37 PM   #4
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Do you know for sure that your chassis batteries are configured to be charged when plugged into shore power? Many coaches are not set up that way.

If they are not, you have several parasitic drains, and maybe enough to drain the batteries. On my coach, in addition to the Smart Steering Wheel, radio memories, etc, the electric steps, leveling jacks, and slides operate off the chassis batteries. Also, you may have a light on somewhere that runs off the chassis batteries.

And, it is possible the chassis batteries are shot. I bought a coach new in July 2003. I had to replace the chassis batteries in June 2005 when they would not hold a charge. One was hot to the touch, and had bulging sides.
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Old 07-20-2007, 12:32 AM   #5
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Fritz, as mentioned by Paul; I do not believe that your coach will charge the batteries for the chassis off shore power. There is a battery disconnect that will need to be turned to off when storing. It should be located at the rear of the coach near or in the engine compartment. GOod luck and have a great summer.
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Old 07-20-2007, 06:01 AM   #6
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Fritz,

I agree that your coach probably does not charge your chassis batteries from shore power. There is a product, "Trik-L-Start that will help with that problem. Disconnecting chassis batteries could affect the memories on your engine and/or transmission computers. Having said that, I do not believe you should have enough battery drain to kill the chassis batteries in 10 days -- unless you have a significant problem. Also when I have had to use the emergency start switch -- it worked right then. A 10 minute delay indicates a real problem. On my coach the emergency start cable puts power to the positive post of the engine battery where the cable to the starter is located. I believe, that makes it a direct connection.

If your unit is an early '04, your batteries may be 3 years old. Depending on how they have been cared for; it is not unusual for them to need to be replaced. You need to have your batteries load tested by a battery dealer or other competent shop.

Green lights and soft breezes,
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Old 07-20-2007, 02:43 PM   #7
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Fritzo, I can't believe that a 05 motorhome would not be equipped to charge batteries on shore power. You might get some better answers from this website Tiffin Network. Check out the Tech Library link.
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Old 07-21-2007, 04:13 PM   #8
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Your coach does indeed not charge the chassis batteries when plugged in. The inverter/charger only charges the house batteries when plugged into shore power. The Allegro Bus was eventually equipped with a BatteryMinder battery charger to charge the chassis batteries but this change first took place in the middle of the 2006 model year so your 2005 won't have it. I'd suggest adding a Trik-L-Start from RVupgrades.com to rectify that.

However, when you hold the Aux Start switch down it shouldn't take that long to pass enough juice over to crank your enginme. Therefore, I believe your batteries are probably bad as well by now. Id recommend testing the batteries and replacing them if they turn out not up to par. Then add the Trik-L-start to prevent this from happening in the future. I installed a Batteryminder myself on my 2004 Allegro Bus but it's a bit more complicated than the Trik-L-Start install. Whichever way you decide to go, RVupgrades handles both models.
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Old 07-22-2007, 12:53 PM   #9
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I just had a similar situation - coach had been plugged in but chassis battery dead - dead - dead!! Hooked up battery charger and within a minute got an error code that translates to: "internal cell shorted - replace battery - not rechargable". Battery was 19 months old - Carquest honored with no cost replacement even though I didn't have any paperwork, just the peal offs on label for month & date.
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