No you can't do this as the Focus has what is called a smart charge system. Part of the voltage regulater is built into the cars main Engine Management Computer. You should either have your alternator repaired or fit a new one or good second hand one with the same part number as the 2004 Focus that you have already.
Can I put an alternator from a mid-90s Ford fiesta in a 2004 Ford Focus
1998 Ford Fiesta Hatchback
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Maintenance & Repair
I was told today by a Ford dealership my alternator is bad in my 2012 Ford Fiesta. I've had the car for 18 months. How is this possible?
2012 Ford Fiesta
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Maintenance & Repair
Battery, alternator and starter all tested good at mechanic. The car still didn't start this morning wondering if it could still be the battery even though it tested good maybe it was charged from ...
2014 Ford Fiesta ST
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Maintenance & Repair
I have a 1 year old Ford Fiesta, mk8 I think. A couple of times I have had a flat battery after the car has not been used for 2 weeks. Checking the standby battery drain I measure 165mA after the car ...
2017 Ford Fiesta Titanium Hatchback
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Maintenance & Repair
I have a 2015 ford fiesta 1.0 ecoboost. It is currently with my mechanic as it was misfiring and idling heavy. Upon initial inspection, the first issue was just a faulty coil pack. Unfortunately thi...
2015 Ford Fiesta SE
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Maintenance & Repair
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