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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 ...
Fuller_Johnson's avatar
Fuller_Johnson
Explorer II
Feb 15, 2021
sch911 wrote:
Grid Heaters cycling on and off. NORMAL!


Yup, and the Grid Heater draws around 100 amps. Enough to even dim the headlights :E

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