Skip the auto shop - Our mechanics make house calls

Q: Charging system - 1990 Ford F-150

asked by on

Problems with charging system. Had batt and alt. tested they said batt was good. Alt was not replaced alt still wont charge

My car has an automatic transmission.

A: Hello. I would suggest checking the voltage...

Hello. I would suggest checking the voltage regulator. This is a unit that monitors the charging system to maintain the proper voltage in the battery by regulating the rate at which the battery is charged. When this is not working correctly, this will sometimes cause the battery to not charge at all or overcharge. This is often times the culprit when the battery and alternator are confirmed to be working properly. If you need to get a second opinion on the system, a certified technician from YourMechanic can come to your car's location to diagnose the charging issue and let you know what needs repair.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: car won't start but turns over

When a car won't start, but the motor turns over, the first thing you need to figure out is what is missing. All gas powered vehicles need a few things to run. Fuel pressure, spark and injector pulse. The...

Q: Car isn't cranking

It sounds like you may have a problem with the battery cables. Check the ends by the battery thoroughly, especially if they have been replaced by universal ones. The main ground cable runs with the starter positive cable and is...

Q: Door making noise

Hello. The door hinges to your right door are loose or detaching from the body of the car. I suggest that you stop use of the right door until you can get the problem fixed. The best place to take...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...