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Bad voltage regulator

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Q: What regulates the voltage to the battery on a 2001 1.6 focus and what would cause it to cook at 17v?
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What is fault 9318 on Ford Focus?

Low voltage from battery


Why alternator will not charge battery on 2005 ford focus... New alternator new battery replaced already?

Voltage regulator or loose wire.


How can you tell if the alternator is bad in a 2004 ford focus?

they will test it for you at napa. Check the voltage at the battery terminals with the engine off and running. The voltage should increase and be greater than 12.


What does it mean when the battery light comes on in a 2002 ford focus?

Bad Alternator or the Battery possibly is losing voltage. I replaced the alternator and serpentine belt before thinking it was the battery. The battery was only 16 months old. But it turned out to be the bad source.


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Check if there is voltage to the starter "S" terminal (if starter does not have the small wire, ensure the starter relay is working). Go from there


Why does the engine shut down when the battery cable is removed on your 2005 ford focus?

Alternator is rated at 110 amps. The alternator should provide the voltage required to run the engine. It should handle the system current load. Check the alternator if there is a charge voltage. Turn the engine off and measure the voltage across the two battery terminals with a DC volt meter. Start the engine and measure the voltage across the battery terminals. Look for an increase in voltage on the volt meter. Typically it can go as high as 14.7 volts. If the voltage stays the same as when measuring the across the terminals with the engine off, the alternator is probably bad. If the voltage is charging but not much higher than when the engine is in the off position, some diodes could have burned out in the alternator. Also check the charging wires and ground wires coming from the battery.


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Can a bad battery cause Ford Focus RPM's to serge?

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