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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 ...
wolfe10's avatar
wolfe10
Explorer
Feb 15, 2021
Yes, the intake heater grid can stay on after engine starting in very cold weather.

NORMAL.

If this continues for more than a few minutes after starting-- not normal.

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