PawPaw_n_Gram wrote:
Where is your voltage measured? Most of the time voltage reported is at the output of the charger/ alternator. So your batteries will actually be getting significantly less than 14 volts if that is the case.
12V has a significantly higher voltage drop over a cable run than 120V.
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The VMSpc takes the voltage reported over the data bus to the diagnostic plug at the front of the coach. I really don't know specifically where it measures the voltage. I suspect the engine ecm sends it to the chassis VDC then into the data bus.
Fred
