Is Your Car Alternator Faulty? Here’s How to Diagnose and Repair It

Automobiles are complex machines equipped with a wide range of components that require regular maintenance. One of the essential components is the alternator, which generates electricity that powers the battery and other electrical accessories. Unfortunately, alternators can deteriorate or break over time, hampering your commute. So, if you are a car owner, it is important to be aware of the signs of a faulty alternator and how to repair/replace it.

Taking quick action can avoid getting stranded and ensure a smooth ride. Below are some signs that may alert you to a possible car alternator problem:

Step 1: Dim or flickering lights
One of the first signs of a failing alternator is a noticeable dimming of the brightness of your headlights, taillights, and interior lights. The alternator supplies power to these lights, and if it is not able to meet the car’s electrical needs, it can cause the headlights to dim or flicker, especially when idling or using electrical accessories.

Step 2: Battery light on
Most modern cars have a dashboard warning light that clearly indicates that there is a problem with the alternator. If the alternator is not working properly, the battery will not receive the voltage needed to run the electronic accessories in the car and the battery warning light will illuminate.

Step 3: Car accessories will be damaged
The alternator supplies power to various electronic components in your car, such as the stereo, power windows, windshield wipers, and even the engine control unit. If the alternator fails, the car’s onboard computer will cut off non-essential accessories. This may cause some functions onboard the vehicle to malfunction, experience malfunctions or stop working altogether.

Step 4: Burning smell from engine bay
If you smell something like burning rubber or electrical wires under the hood, that indicates a failing alternator or worn parts. Such odors are caused by friction, which creates heat and eventually burns the rubber or wire.

Step 5: Crying or Grinding Sound
In some cases, a failed alternator can produce a whining or grinding noise from under the hood, especially when the engine revs.

Step 6: Difficulty starting the car
If your car takes longer than usual to start or start, it could be a sign that the battery isn’t getting enough charge from the alternator. This means that there is not enough power from the alternator to keep the engine running and the car is starting from the power stored in the battery.