2006 mustang 4.0

Asked by GuruBRMK8 Jul 28, 2019 at 04:54 PM about the 2006 Ford Mustang V6 Coupe RWD

Question type: Maintenance & Repair

So everything electrical including windows,radio,
gauges, lights, they only work when its being
jumped. It will stall if i try driving it and it wont start
on its own is that the alternator?

1 Answer
27,670

oilyspill answered 5 years ago

Use digital multimeter across battery posts, everything off, the generic spec for a full charge is 12.6 volts. If battery is down, use a charger and get it charged up. Make sure battery connections all good. With meter leads still touching battery posts, have helper turn key to crank, what's the reading, does it drop, how far? With engine running, check bat terminal at alternator, with accessories on, I like to see as much over 13 volts as I can get. Any applicable trouble codes?

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