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Old 01-23-2022, 05:39 PM   #1
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Radencic - Coach Batteries Not Charging

My Tiffen Allegro 2002 is not charging coach batteries. I notice while hooked up to shore power after a couple days my 12v. lights start to dim. I tried starting engine and motor battery was dead. Obviously the coach was running off the motor battery and not the coach battery. If anyone could explain the possible problem I would certainly appreciate it. Thanks
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Old 01-23-2022, 06:53 PM   #2
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First off, Welcome to IRV2!

Your 2002 very likely does not have anything to charge the chassis batteries when on shore power. In later years, Tiffin added a trickle charger to keep the chassis batteries charged. It's easy to add a trickle charger if you have a 120v outlet close by or you can add an Amp-L-Start that charges the chassis batteries off of the house batteries.
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Old 01-23-2022, 08:58 PM   #3
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To answer your question, your coach batteries are charged by a converter, that turns 120VAC into 12VDC and then sends it to your coach battery. If you are not getting at least 13VDC at the coach battery while on shore power, then you will need to check the AC breakers; you should have one for the converter, cycle that breaker, if it is 'on', and then test again. If still no go, then find the converter (mine was in the same compartment as the shore power cable, but yours is likely different) and check for a fuse or a breaker on the device itself. If you are comfortable with electrical stuff, then you can grab a meter and check for AC input to the converter, and then check for DC power out. It's possible your converter is bad.
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