Battery " LOW VOLTAGE "
I am trying to get to the bottom of an annoying little issue, if I sit in my car for a few minutes with the radio playing but the engine off I get a "LOW VOLTAGE " message appear on the dash and then shortly afterwards everything shuts down, this also happens if I have the interior light on. I have tried the run the engine and unplug the little connector that is attached to a small square block on the negative terminal but this doesn't work either. I have checked battery voltage and its 12.5 to 12.6 volts when left for a couple of hours after the engine has been run and it shows 13.9volts when the car is running, I have had it tested at a local tyre and exhaust and battery depot and they suggested a good run which I did but I'm still getting the message. I am now at a loss, any suggestions.
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