Alternator and 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: 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.

SOURCE: battery wont hold charge

HI. you may have a battery drain issue that is sapping your battery overnight.

Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.