answersLogoWhite

0

American Cars
Alternators
Car Batteries
Ford Aspire

How do you tell if your alternator is bad?


Top Answer
User Avatar
Wiki User
Answered 2015-06-14 17:00:30

If the voltage metere is moving up and down there a good chance that its the alt. You can also place a volt meter on the battery while the motor is running (with every thing off), look and the voltage, then turn your A/C on high, turn your lights, wipers, radio ON, if the voltage goes below 12.5, there a good chance that it is bad.

001
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0
User Avatar

Your Answer

Loading...

Still have questions?

Related Questions

What causes the alternator to stop working?

How to Tell If Your Car Alternator Is Bad Check related link below…


What causes your alternator not to charge?

A bad belt, a bad regulator in the alternator or bad brushes in the alternator.


How do you tell if your alternator is bad in your 1996 dodge neon?

you could pull off your positive battery cable if it stalls out then you alternator is the problem


How can you tell if your alternator is bad on a 1995 Ford Bronco?

Start the car, unplug the battery the alternater should power the car. If it dies the alternator is bad. You can also get it checked at any parts store.


How can you tell if your alternator is bad on a Subaru Outback?

The quick easy method for determining a bad alternator or at least to find out if it is charging, while the car IS running remove the negative battery cable from the battery, if the car stalls then you need to have the alternator service inspected.


How do you tell if Alternator is bad?

Get engine running. While the engine is running disconect the POSITIVE termninal from the battery. If the engine dies, the Alterntor is bad.


Can anyone tell me how to tell if the alternator is bad or going out on my 1993 silverado?

Perhaps thids might help... http://wiki.answers.com/Q/How_do_you_tell_if_the_battery_or_the_alternator_is_bad


How do you tell alternator is bad?

The best way is to drive it to your nearest auto parts store and have it tested. You can test it somewhat yourself. Start the engine and use a volt meter to test the voltage that is being supplied by the alternator for the battery. If it is less than 13.5 volts the alternator is bad.


Why isn't your Mazda truck alternator not charging your battery?

bad alternator, bad voltage regulator, bad battery, bad connections.


Can the bad alternator cause the water pump to good bad?

The alternator is belt driven and so is the water pump but that is where the correlation ends. There is no way a bad alternator could cause a water pump to go bad unless the alternator pulley was warped. Then there is a small chance.


Why wont alternator charge on a 1968 bug?

alternator is bad


Do bad spark plugs have to do with charging the alternator?

Spark Plugs do not affect your alternator. As long as your engine is running then it should be charging unless your alternator is bad


Will a bad ground wire ruin an alternator?

a bad ground wire can ruin an alternator by not completing the circuit


What are signs of a bad alternator?

Start the vehicle then disconnect the battery. If the motor dies, you probably have a bad alternator.


What are the signs of a bad alternator in a Ford Expedtion?

A bad alternator will not give proper power to the vehicle. Dim lights, buzz in the stereo or a dead battery could all be causes of a bad alternator.


How can you tell if your alternator is bad on dodge grand caravan?

Start engine and measure volts at battery, it should be at least 13


What will cause my old and new alternator in my 98 frontier to not charge?

bad alternator cable/corrosion bad battery


What makes the alternator sensor fuse blow?

it can be caused by a bad alternator


Will an alternator work if its bad?

No, if it is bad of course it will not work.


What causes a 2002 Rendezvous' lights to flicker intermittently?

Do you have a amp??if you do it could be that the amp is sucking alot of energy from battery.And I'm guessing u have a stock alternator take your battery to autozone tell them if they can charge it is free and they will tell you is your Battery is bad.. If you don't hav all this maybe you hav a bad alternator and it wont charge ur battery maybe u need a new alternator...,just take your truck to autozone and tell them if they can check your battery and alternator from there you will know what's wrong hope this helps alot I had the same thing and it suck


What could be the problem when a 1981 Chevy Corvette does not charge?

Many possibilities. Check in theis order: Bad battery connections? Bad battery? Loose alternator belt? Bad alternator connections? Bad alternator? (Test at auto parts store.)


Why won't the alternator charge?

Bad alternator? Bad voltage regulator? Bad Battery (won't take a charge)? Bad fusable link? Loose or corroded battery cables?


How do you know you have a bad alternator?

Turn car on remove positive battery terminal if car turns off alternator is bad


How can you tell when an alternator bearing goes bad on a Jeep Wrangler?

Take the belt off and spin the alternator by hand. If you hear a grinding noise, like sand rubbing on metal, its probably going bad. Also try to wiggle the pulley up/down/left/right. If it wiggles, the bearings are going bad. Of coarse you can always wait until they get so bad they shatter and the alternator wont spin at all, like i did. :(


How do you know if your alternator is bad?

If it is makeing a noise or is not putting out at least 13.5 volts it is bad. Take the car or the alternator to an Auto Parts store and have them load test the alternator to be sure.