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Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: Niels on January 22, 2024, 03:43:21 pm

Title: Fairly substantial draw on cranking batteries when shut off and stored
Post by: Niels on January 22, 2024, 03:43:21 pm
Hello Everyone, I recently had to replace the two group 31 cranking batteries in our 2007 Nimbus 336. When connecting the two new batteries i noticed an unmeasured but i believe significant draw. Knowing that some computers and ABS systems can stay active does anyone know what is an acceptable draw when the coach is shutdown and in storage/ Thanks in advance from not so sunny Florida
Title: Re: Fairly substantial draw on cranking batteries when shut off and stored
Post by: Protech Racing on January 22, 2024, 09:34:04 pm
You may try to fit an amp meter across  the post to one lead  cable .   
 Pull fuses  and watch the meter or test light.
        There are many things that can draw power.  In my case i had an amp that failed to shut off with the radio.
 The alternator , may also have a failed diode pack ,  etc.   
 
Title: Re: Fairly substantial draw on cranking batteries when shut off and stored
Post by: Old Toolmaker on January 23, 2024, 08:32:33 am
Quote from: Niels –
>>Hello Everyone, I recently had to replace the two group 31 cranking batteries in our 2007 Nimbus 336. When connecting the two new batteries i noticed an unmeasured but i believe significant draw.

Did you observe a "spark" when connecting the final cable?  That could be from the capacitors int he electronics charging.  If you have a real concern,  the $8.00 VOM from Harbor Freight will tell you everything you need to know, just lift a cable and connect the VOM set for Amperage in series so the entire electrical load of the quiescent coach travels through the meter.


>>Knowing that some computers and ABS systems can stay active does anyone know what is an acceptable draw when the coach is shutdown and in storage/ Thanks in advance from not so sunny Florida

Acceptable draw?  None.  If you can't supply shore power lift one of the battery cables while in storage.

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