Battery’s Cells or Plates Deteriorate Due to AgeĪ conventional battery usually has a lead dioxide plate. Although some manufacturers claim a longer battery life, batteries are not typically expected to last beyond that lifespan. ![]() Usually, a 12-volt battery has a lifespan of three to five years. A 12-volt Battery Usually Lasts up to Five Years Another symptom is if your car is slow to start, particularly on colder mornings. If a cell in the battery shorts out, it would be unable to accept the electrical feed from the alternator. Bad BatteryĪ faulty battery is another common problem that may cause your battery light to turn on while you’re driving. To find out whether or not your dash cluster has malfunctioned, you will usually need to take it to a specialist to be bench tested. These include inaccurate odometer readings or causing other illumination lights to turn on or off when they shouldn’t be. Comes with Other ProblemsĪ faulty dash cluster typically comes with other problems. But a malfunctioning dash cluster often occurs enough to warrant due attention. Faulty Dash ClusterĪ faulty dash cluster is one of the less common battery light causes. If you find rust, repair and run your car to ensure that the battery light turns off after startup. Then, thoroughly examine the actual wire for signs of breakage or corrosion in the cable. Make sure that a good connection can be visibly seen. Inspect the block connector fitted on the back of the alternator. If no faults are found in any of these, you will next examine the wire. This is to ensure that they are both functioning properly. Allow a mechanic to check both the battery and the alternator. The easiest way to determine the problem is by eliminating other causes. Allow a Mechanic to Check the Battery and Alternator It runs either directly to the dash cluster or through an Engine Control Unit (ECU). Often, this wire is connected to the alternator through a standard block connector. The wire feeding the dash cluster is usually a small 15-amp cable, making it more prone to wear and corrosion. If it is less than 12 volts, the battery light will be activated, and the alternator will likely have to be replaced.Īlternatively, the voltage regulator, which safely limits the output to 14.5 volts, may also cause problems if it isn’t functioning normally. The voltage must be between 13.6 and 14.6 volts. You can use a multimeter to diagnose the condition of the alternator easily. Should any of these components ever malfunction, it will prevent the alternator from charging at the current rate required by your car. Bad Alternator Prevents the Alternator from ChargingĪn alternator is an intricate unit consisting of numerous internal components. Remove All Traces of Debris from the Old Serpentine Beltīe certain to remove all traces of debris leftover from the old serpentine belt, which may have gotten stuck in various parts of the engine bay, to avoid problems if it gets caught in cooling fans or pulleys. To diagnose a faulty auxiliary drive belt, conduct a visual examination on the engine to determine if the belt has snapped.Īs long as you haven’t driven your car for a lengthy period without a belt, you may be able to get away with just having it replaced and driving your car normally as usual. The battery light then turns on to warn you that there is a problem. Other symptoms associated with a broken serpentine belt include loss of air conditioning and power steering. When the serpentine belt breaks, it will be unable to spin the alternator, preventing it from generating the electricity needed to charge the battery. Broken Auxiliary Drive or Serpentine Belt Unable to Spin the AlternatorĪ broken auxiliary drive belt is the most common reason a battery light comes on while driving. Broken Auxiliary Drive or Serpentine Belt.There are several causes why the battery light on the vehicle’s dashboard turns on. The light comes on due to either a defective dash cluster or a faulty car battery on rare occasions. Other probable causes include faulty wirings or a broken alternator. When the car battery light turns on while you’re driving, it is most commonly caused by a broken serpentine or auxiliary drive belt. Read on to learn more about the battery light on the dashboard, its causes, and how to fix it. The steps for fixing the battery light on the dashboard are the following: Broken Auxiliary Drive (Serpentine) Belt. ![]() Nine causes why the battery light on the vehicle’s dashboard turns on are the following: ![]() What causes the battery light on the dashboard to come on, and what should be done about it? This is especially true with the car battery warning light. You should always pay attention to the lights on your dashboard when driving, as they may be alerting you of a severe issue with your car.
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