Replaced both batteries, truck won't start voltage drops from 11.9 to 10.3

Asked by Ken Feb 03, 2018 at 05:46 PM about the 2006 Ford F-250 Super Duty Lariat Crew Cab LB 4WD

Question type: Maintenance & Repair

Truck wouldn't start  replaced both batteries, repaired one
pos terminal. Still no joy

2 Answers

F_O_R answered 6 years ago

11.9 volts is quite low. I would charge them up and also have the alternator tested.

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olds403 answered 6 years ago

I agree with F_O_R , Has to be a problem with the charging system What is the input voltage to the battery when it's running it should be about 14and 1/2 volts if the system is charging properly

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