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Why battery light on dash come on driving
1999 Mercury Sable

Why battery light on dash come on driving

(1999 Mercury Sable)
started car took off driving acted like it had power surge battery light stays on
2 answers & 2 comments
Popular Answer
on November 11, 2016
that's probably what's wrong if it dropped to 11 VDC from 12.5 VDC..you gotta take it off anyways..if not and that's the problem,it's gonna drain your battery again if you drive it..have the parts store test it a couple times in store..if buying another one there,have them test the new/reman before you leave the store! seen to many bad ones right out of the box(at the ZONE)..NAPA has the best ones,very low return rate! been around since 1925!
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General Diagnosis
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on November 11, 2016
that's probably what's wrong if it dropped to 11 VDC from 12.5 VDC..you gotta take it off anyways..if not and that's the problem,it's gonna drain your battery again if you drive it..have the parts store test it a couple times in store..if buying another one there,have them test the new/reman before you leave the store! seen to many bad ones right out of the box(at the ZONE)..NAPA has the best ones,very low return rate! been around since 1925!
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on November 11, 2016
Well it could be a battery, alternator, dash light short or a short it really needs to check out by a qualified technician.
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on November 11, 2016
Okay thank you I put the charger on it charge the battery to full check the voltage on a battery it was 12 and a half volt battery is new started car the voltage drop down to 11 I'm thinking it's the alternator
on November 11, 2016
That sound like a very good place to start there is nothing exotic about that charging system.
Good Luck

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