Forum Discussion
arhayes
Sep 21, 2018Explorer
It's not even necessary to pull the batteries initially. Just disconnect SP and put a meter on each to make sure you are getting at least a solid 6 volts on each battery, and then that you get 12 volts at the buss. I'll bet you are not. You probably have a weak/shorted cell on one battery and it is not delivering enough voltage to run the radio on battery only. It slowly builds on SP and Generator because the converter in delivering 13.5 volts and is able to deliver enough through the batteries to overcome the weak/lost cell. It may be giving less that 12v, but enough to overcome the low voltage cutoff on the radio.
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