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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 34442
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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what does it mean when the battery gauge is near the high ...

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what does it mean when the battery gauge is near the high voltage red line? When we drive our car the bat gauge is in the normal 11-15 volts range but after a little while of driving its slowly creaps up toward the 18 volts end which is in the red area.


What this means is, its likely your alternator which has a built in voltage regulator and it is over charging your battery. You should have the alternator tested and most likely it will need replacement.

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The normal charging rate is 14.2 volts. This could ruin your battery if you let it go to long.