Why does my car keep dying with a new battery and alternator?

Some of the most common reasons for a car battery to die repeatedly include loose or corroded battery connections, persistent electrical drains, charging problems, constantly demanding more power than the alternator can provide, and even extreme weather.

What causes a car to lose all electrical power while driving?

Driving a car with a dead battery can also damage the alternator. The engine may not start, or you may suddenly lose all electrical power while driving. Ignition coil and other ignition components. Provides power to the spark plugs, and increases the voltage of the power provided to the spark plugs.

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.

How do I know if my alternator voltage regulator is bad?

Symptoms of a bad voltage regulator may include:

1. High voltage output.
2. Low voltage output, sometimes.
3. No voltage output.
4. Lights dim or flicker.
5. Faulty high-beam headlamp bulbs.
6. Engine working erratically (weak or flickering ignition system)
7. Adding water to the battery frequently.

Why wont my car start but I have power?

A failure of the starter motor can be a reason why your car won’t start but has power. To confirm that it is indeed a starter motor issue, you can diagnose a dead battery or alternator. If these are working, and the engine won’t crank at all, the starter motor is most likely your culprit.

How do you know if your car fuse is blown?

Remove the fuse from its holder. In some cases you may need a small screwdriver to unscrew the fuse holder cap. Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.