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Old 03-03-2015, 07:40 AM   #31
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Join Date: Jun 2013
Location: Mount Laurel, NJ
Posts: 927
smo99, it sounds like you had been severely running your cabin batteries down. Even though they are deep cycle, you will get longer life if they are not discharged below 50%. Specific gravity testing can tell the charge state, but while on the road, the voltage level is a good measure. While 12.75 volts is fully charged, about 12.20 volts is 50% charged. Because of this small difference, a digital meter is required right at the battery terminals. You can spend many hundreds of dollars to add the voltage and current remote option to the Magnum converter/inverter or wire the few dollar device to the terminals, which link follows. There has been many threads on this subject; do a search for them.
Digital Voltmeter |

Gale & Hank- 2012 Berkshire 390BH
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Old 03-05-2015, 07:56 AM   #32
Join Date: Mar 2015
Posts: 58
Thanks for all the help so far everyone. I found the issue with the pump, the fuse fried when the pump was frozen--easy fix--whew.

Question on my tank heaters. I have a switch on my main control panel inside the coach for Tank Heaters. It lights up red when on. However, I don't see anything that looks like a blanket (or are the heaters inside the tank?). And where the diagram in the electrical bay says there should be a fuse for tank heaters, there isn't any fuse at all. Am I being spoofed in thinking I'm heating my tanks when in fact all there is a lighted switch? The light for my water pump stayed lit even when the fuse was gone. So I'm wondering if I need to get a fuse in that slot?

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