Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert, Get an Answer ASAP!

Ford Voltage Regulator Problems

A voltage regulator is a mechanical device that is used to control the level of voltage in an alternator of a vehicle. Often, these regulators may fail to function properly causing a car to experience several types of problems related to it. Fluctuating battery, faulty alternator, poor wiring, failed charging and so on are some of its frequent issues. Taking advice from an Expert is always a good decision when faced with these questions. Below are frequently asked questions on issues relating to Ford voltage regulator problems that have been answered by the Experts.

Is it possible for a gem module on a car to get shorted out by a defective Ford voltage regulator?

Regulators can cause the alternator to overload resulting in the gem module shorting out.

What could cause an alternator to fail to charge even though there is a replaced Ford voltage regulator?

It could be that the wire or the driver in the computer has gone bad causing this problem to occur. A person could visit ‘do-it-yourself’ sites online for help. However, if that is not effective then contacting an Expert for help is highly recommended.

What could cause a car battery to leak water out of the top filler caps despite having changed the Ford voltage regulator?

Normally, when a battery gets overfilled, it fails to vent properly so the battery is leaking the extra fluid out of the filler caps.

What causes a vehicle to start, run for a while and then die even after the Ford voltage regulator has been replaced?

A faulty ignition module can cause a voltage fluctuation causing the module to go bad. If the module is good, then it could be a defective stator in the distributor or a damaged ignition coil.

Why would a Ford voltage regulator in the alternator fail to function?

The alternator may have cheap aftermarket parts installed within it, replace these parts with proper Ford Motorcraft alternator. Many Ford stores sell the replacement part and the owner can check the user manual to get the diagnostic instructions for repairing the aftermarket parts.

Could a faulty Ford voltage regulator cause a car to surge and the dim lights to go bright?

A bad voltage regulator could be the cause and there could be a problem with the charging system. Inspect the charging system for any defects and replace the entire alternator as the voltage regulator is located inside the alternator.

Determining if the Ford voltage regulator is damaged or causing problems can be difficult and stressful for the car owner. Contacting a Ford Mechanic Expert will help give clarification and possibly step by step instructions to fix the problem.
Please type your question in the field below

3 verified Ford Mechanics are online now

Ford Mechanics on JustAnswer are verified through an extensive 8-step process including screening of licenses, certifications, education and/or employment. Learn more


ASE Certified Technician

Vocational, Technical or Trade Scho

27016 positive reviews
Chris (aka- Moose)

Ford Technician

Vocational, Technical or Trade School

33977 positive reviews
John Mc

Ford Technician

Vocational Trade School

5495 positive reviews
See all Ford Mechanics