How to change a alternator

Chandon Bullcalf

Asked by Jan 22, 2016 at 05:45 PM about the 2003 Ford F-150 XL Extended Cab 4WD LB

Question type: Maintenance & Repair

Need to change a alternator in a 2003 f-150

3 Answers


The change is straight forward and the alternator easy to get to. Loosen the belt and remove the bolts that hold the alternator and unplug the wires going to it. Installation is the reverse.


First determine if the alternator requires changing and a fault in the alternator is present. You can do this with a multi-meter, or remove it, then bring it to a place like Autozone and they will test it for free.


Easy, Disconnect battery, use a 3/8" breaker bar or ratchet to looesen your belt tentioner, remove front and ine rear bolts, remove battery cable and wire connector, remove alternator. Reverse steps to install new one

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