"check Charging System" After Leaving Light On Causing Dead Battery

Ben Beck

New Member
Jun 4, 2013
7
0
2
Hey all,

Car: 2010 Mustang GT Premium

Thanks in advance for any help. I managed to leave a light on in my car, causing my battery to go dead. I charged up the battery with a charger overnight. The next day, it started right up. As soon as I started driving, I got the "check charging system" light. It seems to go off and on occasionally. I have not had any issues with the car starting or dying however. Any thoughts? Did I kill the battery or alt? I checked the voltage via OBD and it showed 14.4 at idle.
 
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