battery issue
110

Asked by Albert Jan 25, 2019 at 05:37 PM about the 2000 Ford Taurus SES

Question type: Maintenance & Repair

My daughter has a pretty new battery in her older Taurus.  She drives to
work 8 miles then after work it unlocks with the key fob and the battery acts
dead with the dome light dark...disconnect and reconnect the ground on the
battery and its good to go.  Parked over the weekend it starts and runs great.  
Goes to work, comes out 9 hours later and it again acts like a dead battery
until disconnecting ground on battery and reconnecting which fixes it again.  
Next morning after sitting 16 hours starts fine at home and repeats the dead
battery at work.  Naturally this is not repeatable on demand so mechanic
finds nothing wrong.  The OBD shows no errors.  Car is low mileage and
immaculate inside and out.

3 Answers

F_O_R answered 5 years ago

Rule out corrosion by cleaning the terminals and battery cable ends and using a corrosion preventer. Make sure the connections are tight.

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110

Albert answered 5 years ago

The connections are clean and shiny, first thing i thought of. after looking for corrosion on the battery and testing voltage which was fully charged but zero going to any lights even, then it was removing all the fuses to make sure they were not corroded. Then I removed the ground cable on the battery to see it was like new and then put the cable back on and everything was working. Drove the car home. Next morning it started instantly, drove to work and after work everything was dead again. Took the ground wire off the battery then put it right back on and everything was good.[ The battery is less than 6 months old and the terminal is clean and tight, but that's twice in two days. Today took a different vehicle to work. Drove the Taurus around the neighborhood, put it back in the garage and it starts right back up...let it sit for 6 hours...started right back up.

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110

Albert answered 5 years ago

Could it be the computer and disconnecting the battery resets it to stock settings?

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