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otrfun's avatar
otrfun
Explorer II
Feb 15, 2021

Cold Ambient Temps = Higher Alternator Voltage?

Our '16 Ram 3500 Cummins (220a alternator) typically charges around 14.3 - 14.4v about 95% of the time. On occasion charge voltage will drop to 13.9v on a long trip when the batteries get topped-off ...
RLS7201's avatar
RLS7201
Explorer II
Feb 15, 2021
If your alternator has a solid state built in regulator, what you are seeing is designed in and normal.

Richard

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