What would cause a battery to not hold a charge?
Here’s a quick rundown of some of the most common causes of a battery that won’t hold a charge: When you drive the car, the battery isn’t getting recharged, i.e., there is a mechanical charging problem. There is a parasitic electrical drain on the battery, possibly caused by a bad alternator.
Why would a car not start if the battery and alternator are good?
If your vehicle won’t start, it’s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter. It can be hard to determine if you’re dealing with a battery or an alternator problem.
Why is my brand new alternator not charging my battery?
The most obvious reason why your battery won’t charge when your alternator is brand-new is that the problem is with the battery itself. If you’re not 100% sure, you can use a multimeter, or a voltmeter, to check the current coming from your battery.
How do you fix a battery that will not hold a charge?
How to Fix a Car Battery That Won’t Hold a Charge
- Prepare the battery. Put on the safety glasses.
- Perform a load test. Connect the load tester to the positive battery terminal first and then to the negative post.
- Remove the cell covers.
- Perform a hydrometer test.
- Test the cells.
- Add the treatment chemicals (optional).
Can a fuse cause alternator not to charge?
Is there a fuse on the alternator? Yes, there is a fuse on the alternator of a car. Though not all vehicles have them, a majority do. If the fuse is blown, the alternator will not charge the battery, and the vehicle will not operate.
How do I know if my alternator voltage regulator is bad?
Symptoms of a bad voltage regulator may include:
- High voltage output.
- Low voltage output, sometimes.
- No voltage output.
- Lights dim or flicker.
- Faulty high-beam headlamp bulbs.
- Engine working erratically (weak or flickering ignition system)
- Adding water to the battery frequently.