Battery light

Asked by Feb 15, 2017 at 12:09 PM about the 2007 Ford Focus

Question type: Maintenance & Repair

I have a 2007 Ford focus after about 30
seconds of engine running my battery light
comes on .I have changed the alternator the
serpentine belt and the batt.

2 Answers

112,405

Sounds as if you have a bad ground, check all the grounds on the car, I think there is a total of four on your car, clean with a wire brush

104,295

This vehicles charging system is computer controlled, so if there is a glitch in the programming it could be shutting off the alternator, a good scanner will have a live data test mode then you can actually see what the computer is doing.

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