service engine light and battery light are on do i have alternator problem

Asked by Mar 14, 2015 at 04:55 PM about the 2000 Ford F-150 Lariat Extended Cab LB

Question type: Maintenance & Repair

1 Answer

820

Do your headlights get dim and then brighten up when you bring up the rpms? If so its most likely an alternator, all though an alternator shouldn't cause the check engine light to come on. The best way to check an alternator is to put a voltage meter on it, it should be charging around 14 volts

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