what cause alternator to go bad
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ALTERNATOR TOPICS Symptoms of a Bad Alternator, alternator problems. Symptoms of a bad alternator include hard or slow cranking when you try to start your vehicle, lights that seem too dim, and of course the red BATT, ALT, or GEN light glowing on the dash. (A friend of mine once remarked that she'd never seen an alternator warning light on a car, just a Battery light.
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- - Common Symptoms. A weak alternator can result in dimming of the dashboard lights and the headlights. A failing alternator can cause problems starting the vehicle and may result in a repeated need to jump start the vehicle. Common Symptoms. A weak alternator can result in dimming of the dashboard lights and the headlights. A failing alternator can cause problems starting the vehicle and may result in a repeated need to jump start the vehicle.
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Why does the alternator make a clicking noise? A bad alternator will make whats called a whirring noise. It could also make a low growl. This is just the bearings going bad. If your alternator is not supplying any power, i…t has nothing to do with noise typically.
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What Are the Causes of Alternator Failure? As more plates fail, the power drops to levels that will eventually cause the battery to die and the ignition system to fail. Testing the output regularly with a voltage tester while the car is running can give indications that these plates, or other components, are wearing out.he primary mount of the alternator serves as the negative ground and usually the mount will be wired to the vehicle's frame with a large cable. This cable is held onto the mount with one bolt, and it is known to become loose or disconnected.
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Tell Us What You Drive and We'll Tell You if it Fits. Your alternator also plays a significant role in how your car runs and performs. For example, if there's a lack of voltage from either the battery or the alternator, the voltage supply to all of your accessories is robbed of power necessary to function properly.
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How do you know if the alternator is bad? 1 I tested the alternator with a volt meter and sure enough it was bad. 2  Battery continually going dead. 3  Best thing to do is drive the car to an Auto Parts store and have the alternator load tested. 4  If you do not have a voltage tester bring it to a repair shop and have them test the alternator. My battery indicator light came on, but the car would still start and the alternator belt was intact. 2  I tested the alternator with a volt meter and sure enough it was bad. 3  Battery continually going dead. 4  Best thing to do is drive the car to an Auto Parts store and have the alternator load tested.
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-   Bad diodes in the alternator can cause the battery to go dead when the car is off.   The diode bridge (six diodes) is directly connected to the battery, and is used t … o convert three phase delta AC from the alternator's stator to DC for the battery. Bad diodes in the alternator can cause the battery to go dead when the car is off.   The diode bridge (six diodes) is directly connected to the battery, and is used t … o convert three phase delta AC from the alternator's stator to DC for the battery.
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Alternator and Starter Diagnosis If the alternator passes the tests, the problem is not the alternator but something in the wiring or the charging system control circuitry. High circuit resistance and ground connection resistance can cause low charging output.
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- 60+ years experience in auto repair. Built and raced a car for 2 years on the drag racing circuit. Yes If the alternator fails, it is no longer keeping the battery charged and your engine is running on nothing but battery power. Once the battery runs down, your engine will no longer run.
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What is a Charging System? There are a number of things that can go wrong with a charging system: 1  Insufficient Charging Output. If one of the three stator windings failed, the alternator would still charge, but only at two thirds of its normal output. 2  Too much voltage.
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Six Signs of Alternator Issues Weak or dead battery. A car battery, by definition, has a finite life and will not last forever. As good as an alternator is at replenishing your car battery; it can only recharge it to the point that it has a decent amount of life left in it and is able to accept a charge.
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Signs You Need to Replace Your Alternator Sounds similar to my issue. Does the car have choppy idle, or run really rough? It could be your alternator overcharging, which will cause a lot of issues. Have them load test the charging system at advance auto parts, anything over 14.2 is not normal, and above 14.5 will give you issues.
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Alternator Repair Service & Cost Your alternator charges your battery, which powers the electronics in your vehicle, such as the radio and the air conditioning. The battery is also needed to turn on your vehicle.
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- >One of the biggest reason for alternators to go bad is the battery and/or connection. Batteries have little effect on the life of an alternator. Take one apart sometime and try to figure out which parts wear out because of a bad battery. Alternators have lots of problems but batteries aren't one of them.
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How to Find a Parasitic Battery Drain 9. You can also try unhooking the big wire from your alternator. The alternator can sometimes have a shorted diode that can cause amps to flow through the alternator's power cable and through the shorted diode and into the case and through the bolts and back to the negative battery terminal.he alternator can sometimes have a shorted diode that can cause amps to flow through the alternator's power cable and through the shorted diode and into the case and through the bolts and back to the negative battery terminal.
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- Your car has an alternator that is driven by the engine. As the engine runs, it creates electricity that is both used by the car and stored in the battery. If the alternator fails, then the battery is the only source of power for all the electrical components of the car including the ignition system. If this happens you need to get it fixed ASAP.
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Ford Voltage Regulator Problems Regulators can cause the alternator to overload resulting in the gem module shorting out. It could be that the wire or the driver in the computer has gone bad causing this problem to occur. A person could visit ‘do-it-yourself’ sites online for help.
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Alternator Adapter Plug When this component is not working properly, the electric current can't directly flow through the wires, leading to system malfunction. Sooner or later, all the components in your electrical system will completely shut down. In this kind of situation, the best solution is to replace your alternator adapter plug.
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- - Best Practices. The entire starting and charging system should be inspected before replacing the alternator to eliminate other problems that may be affecting the alternator's performance. For instance, a weak battery and/or battery cables will result in a failed alternator test. The alternator belt may be partially or totally removed while replacing the alternator, so if it shows signs of wear, this is a good time to replace it.
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What causes the the corrosion on battery terminals in a vehicle. Causes for rapid build up.? Overcharging by the alternator and bad contact between the terminals can cause battery corrosion. Keeping the terminals clean and tight will prevent the corrosion from bad contacts. An old battery that is in bad shape or a faulty alternator can cause the overcharging. Below is a link for cleaning battery corrosion. Source(s): http://www.diybuildingandrepairs.com/auto-repairs/how-to-clean-battery-corrosion.html.
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Why Would an Alternator Overcharge? The reasons alternators overcharge include issues with the battery, drive belt, alternator output, external regulator and type of alternator, explains AA1Car.com. Issues with these specific components result in the alternator overcharging the vehicle’s battery and electrical system.
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Your alternator doesn't charge your battery the way you think it does. And secondly : if you have to keep charging the battery, it means either your alternator is about to give up, or more likely, the battery itself is about to give up. Expect 3 to 4 year's life out of a normal 12v car battery, irrespective of what the manufacturer or guarantee tells you. 5 years is out of the ordinary. 6 years is extreme. If you live anywhere with wild temperature swings, expect 2 to 3 years before you need a replacement.
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Six Signs of Alternator Issues It takes a lot of battery power to get – and keep – your vehicle running. So much power that if not for the alternator, the battery’s power reserve would not last. Your vehicle’s electrical system depends on an optimally running alternator.
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- Your car has an alternator that is driven by the engine. As the engine runs, it creates electricity that is both used by the car and stored in the battery. If the alternator fails, then the battery is the only source of power for all the electrical components of the car including the ignition system.If this happens you need to get it fixed ASAP.he battery symbol, when lit, has nothing to do with the battery. It indicates that the alternator is not putting out enough voltage to BOTH run the car AND re-charge the battery.
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My car battery voltage is at 13.4 v is that good? This is fine it sounds like the car is running good and it starts up easily. Im not sure why the one answerer things your alternator is bad but alternators put out volts and amps. As long as everything seems to be working fine particularly at night when all the lights are on your car battery and alternator are doing their job.