put in new alternator but it will not charge battery. alternator was tested and found to be good. why wont it charge the battery?
I have a 1997 ford expedition that the alternator is not charging the battery. Had the alternator tested and it was good the battery is new. Cant find the fuse for the alternator does anyone know where it is?
Have your battery tested first, if it is good most likely it is a bad alternator, have that tested as well
Most likely cable running from stud on top of alternator to battery terminal is corroded or broken.
A new battery or one that tested good is in the vehicle and the car is still losing power. the alternator is what charges the battery while the vehicle is operating.
The battery light comes on when the alternator is either over or under charging. If the alternator tested good you have a wiring or computer problem. The engine computer is the voltage regulator.
have the battery tested, average life of a battery is 2 to 3 years. if battery is good check voltage regulator and starter motor. there is a short somewhere if the battery is good
Loose or corroded connections or the battery has a dead cell and will not accept a charge and must be replaced.
battery and or alternator are shot, check alternator by starting the car, and removing either the positive or negative battery cable,,, if the vehicle continues to run the alternator is good.
either your belt is loose or alternator is faulting out go to nearest part store and have it tested for most accurate test remove alternator from vehicle I've had that happen before and in the vehicle alternator tested good. removed from vehicle it tested bad. replace alternator no further problems
test the voltage on the battery first, then on the alternator. If its good then it could just be the diode in the alternator. I would suggest you replace it becuase eventually your alternator will die and the battery will not get charged leaving you stranded somewhere. It is possible to just be a battery but you wont know unless you have the battery tested. check the voltage on the battery and the alternator before you do anything else.
If the alternator is in good condition, it should provide a charge to the battery while the engine is running and it will recharge if the battery is also in good condition. The act of starting the car actually discharges the battery.
the battery could have a dead cell, this could cause it to not charge. Have the battery tested to be sure.
It could be two things. As you know, the alternator charges the battery so it will not drain. If the alternator is not working properly to charge the battery, the battery will continuously drain. Have the alternator tested at your local Auto Parts store (NAPA or Advance Auto) If it is good, have the battery checked.
If the alternator is good then the battery is bad.
Perhaps starter is weak. Have it tested for load and drag
you need to take the alternator off and have it tested advance auto parts does this for free
Check the LARGE wire on the back of the alternator. Make sure it has a good connection and that the crimp-on connector is in good shape. Then follow the wire back. In general, check the wiring of the alternator and make sure everything is connected right.
one is most places test for free. but the easy at home way to check is get your car jump started if its not starting on its own. after its running, pull the negative off the battery taking special car not to arc your wrench on anything. if its keeps running, alternator is good. if it dies, get it replaced. if the alternator is bad, it may have killed the battery, so get it tested and replaced if needed.
If you can get your vehicle started you can then un hook the battery while it is running and if your vehicle stays running then your alternator is good. If it stalls and dies as soon as you unhook the battery then the alternator is not good.If you can get your vehicle started you can then un hook the battery while it is running and if your vehicle stays running then your alternator is good. If it stalls and dies as soon as you unhook the battery then the alternator is not good.
Has the battery been tested, does the alternator on the Durango try to charge?... If the truck runs with the battery but the battery doesn't take or hold a charge, it has to be the battery being bad or extremely bad terminals so that the charge can't reach the battery. Age of the battery doesn't matter, a fairly new one can still go bad.
Start the engine and test the voltage at the battery posts with a voltmeter. If you get a reading of 13.5 to 16 volts DC then the alternator is more than likely good. Charge the battery fully and then have it tested at any auto parts store. They will test if for free.
If you *know* the alternator is good, like you just replaced it, or removed it and had it tested down at the autoparts store, then it could be any number of problems. Check all cables and connections between the battery and alternator. This includes cleaning the connection terminals on the battery (they make a special wire brush for this purpose). If that is all done and the problem still exists, then it is probably a bad battery. Check the fluid levels in the battery, if they are fine then take it down to the autoparts store and have it tested as well.
The first place I'd start would be the battery, alternator and starter. Verify that the battery is good and that the alternator is fully charging it, and that the starter isn't drawing too much current.
If the question is how to check your alternator on a 2000 Honda accord is by starting your car and disconnect your battery if the car is still running for max 3 mins you know your alternator is good.