Charge the battery over night.If the battery is indicating a full charge the following day, put it back in your car . If not then it might have frose at one time on you. A battery that has ben frozzen, will never hold a charge again and you will half to replace it.Once you have fixrd the battery problem you can start your car and let it warm up to normal opperating temperature and then remove the possitive battery cable from the battery. If the car keeps running the Alternator is ok if not then replace the Alternator.Good Luck.
Have alternator tested for free see if its putting out correct amount of amps to charge battery
SOURCE: battery not holding charge.
try testing the battery terminals with a tester check the voltage with the DC 50V range(red to the positive black to the negative body ground). at engine shut the bat should read 12V. start the engine it should read 13 to 13.5v. If it checks that way it should be charging. Same happened to my civic. until I added a grounding lead wire to the negative post of the battery to a good grounding spot to the car engine. It solved my problem. Somehow honda's this series has no good grounding or the original wires are short of conductance.
SOURCE: Car won't stay running.
alternator does not hold a charge it simply charges the battery by unhooking the battery you are taking all voltage from computer and car will not run the proper way to test your alternator is use a multimeter and check voltage at battery while car is running if you have 13-14 volts it should be fine.
SOURCE: 1991 volkswagen jetta battery won't hold charge
where did you get your alternator? mine broke a couple weeks ago and the new one from o'rilies was bad off the shelf.. i would take it back off and have whoever you got it from test it..
SOURCE: Battery replaced - won't hold a charge. Is the alternator the problem?
THE BATTERY IS ONLY FOR STAR THE CAR. WEND THE THE CAR IS RUNIG ALTENATOR IS CHARGING THE BATTERY FOR NEX TIME YOU NEED TO STAR THE CAR . CHECK CHARGE ON THE ALTENATOR . IF ALTENOTOR NO CHARGING REPLACE.
SOURCE: new battery and alternator. Battery still won't hold charge
Check all your fuses if you had a system failure it could have blown a fuse. I am not sure on your vehicle where the fuse is in the car or under the hood it could also have a relay. You can check your alternator by checking the voltage at the back of the alternator where the big wire bolts on. You should have 14+ volts at the alternator.
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