The alternator is a part of the electrical system and uses your engine to create energy that can be turned into electricity. That electricity recharges your battery as you drive. Without the battery, your vehicle will not run, and without the alternator, your battery will not stay charged.
Here are four symptoms of a failing alternator:
Dim Headlights
When the headlights are dim, your radio does not work, or you cannot charge your phone using the USB port, there is a problem with the electrical system. It could be the battery, but it could also be your alternator.
Warning Light
Your vehicle may have a GEN or ALT light on its dashboard, and if it is lit up, then you have an alternator issue. Do not ignore this light as the alternator can fail at any time.
Difficult Start
Even hybrid vehicles need an alternator to power up the electrical system. If your vehicle stalls out as you drive or is hard to start, you may have a failing alternator. Stalling can be a symptom of other engine issues like fouled plugs and poor fuel delivery, but it can be your alternator.
Dead Battery
If your battery will not hold a charge, it may be a bad alternator. If your battery can be charged by jump, but dies soon afterward, it may be your alternator that is the problem. If the car continues to run once it’s been started, there may be a problem with the battery.
There are many other symptoms of a bad alternator that include:
- Noise – Like all mechanical parts, when an interior part starts to fail, it will make noise. The alternator may make a whine or a growl as it fails. Since the alternator is driven by belts like the serpentine belt, if the pulley is unable to turn the alternator shaft, it will make a noise. Bad bearings and bushings are noisy.
- Bad Smell – A burning alternator will smell bad. The alternator must be able to turn freely, and if a part is out of alignment, it will cause friction. If it overheats, it will start to smell like burning rubber.
- Bad Belts – A broken belt on the alternator will stop it from turning, which means it has stopped working.
If you want to keep your vehicle in good running order, check all of the mechanical parts regularly. If you do have alternator problems, then contact a professional technician for more help.