Can a bad battery cause a whining noise?
The battery light is an indication that something in your charging system is not working properly such as a weak battery (usually noticeable with a weak start), a failing alternator or a bad voltage regulator. The whining sound may be the alternator failing which is common when this happens.
Why is my Toyota making a whining noise?
If the fluid is too low, then the internal components of the transmission are not lubricated properly. If the fluid is low, it’s advised to check for transmission fluid leaks. The real thing You want to watch for here is a new whining noise. A bad input shaft bearing can create a whining sound when it begins to fail.
Can a bad battery make your alternator whine?
The grinding sound may be caused by a worn-out bearing. Your car can also make a whining sound when the voltage regulator is sending signals to the alternator to charge more than is necessary. If you hear any type of whining or grinding sound that’s a good indication that your alternator needs to be checked.
Why does my engine make a whining noise?
Whirring or Whining Whirring and whining noises often vary as the engine runs fast or slow, and they can indicate a number of different problems, including a failing water pump, a bad power steering pump, low power steering fluid, a failing alternator, or problems with the air-conditioning system.
Why is my car making a whining noise when idling?
If you are hearing whining noises when your car is idling, you are probably either low on oil due to an oil leak or your valves are stuck and need adjusting.
How do you tell if its your battery or your alternator?
If your engine won’t turn over or takes far longer than usual, it’s time to grab the jumper cables and attempt a jump-start. If your engine starts and stays running but won’t start again later, it’s likely a battery problem. If your vehicle immediately stalls, it’s probably a bad alternator.
How do you know if your alternator is whining?
If you hear a small rattling or grinding sound when your engine is running, this could be caused by a loose bearing in your alternator. Conversely, if you hear a constant high whine while you are driving, this is usually a sign that your alternator is failing to distribute the necessary power throughout your vehicle.
Why does the battery light go out in a Toyota?
If it isn’t connected the alternator will not work. and if the light isn’t grounded to the connetor it isn’t going to light either. When the alternator’s voltage equals or exceeds that of the battery, the diode prevents reverse flow back through the light and the light goes out.
Why does my alternator not turn on the battery light?
That battery is likely at or near the end of it’s useful life. A weak battery or working charging circuit won’t turn on the battery light. Since you pretty much ruled out the alternator I would make sure to check your fuses. IIRC there are 2 fuses for the alternator (will check my diagram later).
How can I tell if my Toyota Corolla alternator is working?
With a multimeter you do a quick test to see if your Corolla’s alternator is working or not. The following was taken from bad alternator diagnosis page on this site:
What should the battery voltage be on a Toyota Corolla?
With your Corolla turned off, you’ll connect the negative side of the meter to the negative battery post or wire. Touch the positive side of the voltmeter to the positive battery wire. With the engine off, you should get a reading somewhere between 12.0 volts and 12.6 volts.