Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars - View Single Post - Battery light comes on after 30 seconds
View Single Post
post #1 of (permalink) Old 03-20-19, 02:02 PM Thread Starter
DaughtersCar
Registered User
 
Join Date: Mar 2019
Posts: 4
Battery light comes on after 30 seconds

I have an ‘05 Mariner (V6). The alternator was not charging my battery (battery light on and alternator output would only go above 12 volts if the engine had high RPMs as measured with a voltmeter on the battery, the the battery light would go off).
Just got through replacing the alternator, and was happy to see the meter indicating 14volts and battery light off. However, after exactly 30 seconds, the battery light comes on even though the battery is still receiving 14 volts. Shut the engine off, start it back up, and EXACTLY 30 SECONDS later the battery light will come on, every time, even though the alternator output is good.

DaughtersCar is offline  
 
 
For the best viewing experience please update your browser to Google Chrome