What causes battery light to stay on when car is off?

A loose or corroded battery cable. A problem with the alternator or voltage regulator. Damaged cells or plates inside the battery. Faulty wiring in the car's electric charging system. via

How do I reset my battery light? (video)


What fuses would cause battery light to come on?

Yes, it can. If the safety fuse breaks, the electricity supply from the alternator to the battery and vice versa will be altered. The termination of the power supply between these two components will automatically send a signal that causes the battery light to turn on immediately. via

Why is red battery light on?

The battery is charged by the alternator when you are driving. It's when this system is not working correctly that the red battery light on your dashboard will light up to alert you to the problem. via

How do you fix a battery light on a dashboard?

  • Inspect the battery. Check your vehicle's battery for signs of corrosion on or damage to the terminals.
  • Check the alternator. Take a look at your alternator for any loose or missing electrical connections.
  • Look at the serpentine belt.
  • Check your fuses.
  • Test the battery.
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    What happens when an alternator is loose?

    If your alternator belt gets too loose as you're driving, it may cause your engine to stall. This means that you're engine essentially shuts down and you'll be forced to pull over onto the side of the road. Obviously, you wouldn't want this happening on a busy street or rush hour traffic on the highway. via

    What would a loose alternator belt do?

    A loose alternator belt means that the battery does not get adequate power. So, it makes sense that the battery warning light will come on when it does not get enough electrical energy from the alternator. via

    Does a blown car fuse smell?

    It can become hot enough to start melting the plastic outer and the plastic on the back of the fuse. This is the plastic burning smell you've noticed; it's not pleasant. via

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