How far can I continue to drive with a bad alternator? With a faulty alternator and a fully charged battery, you should expect about 30 minutes of operating capacity or about 30 miles. Most cars draw 20-30 Amps while operating and have a battery capacity equivalent of about 50 Amp Hours.

Is it dangerous to drive with a bad alternator?

A bad alternator will result in a discharged (dead) battery and cause a vehicle to not start or run. Alternators are designed to maintain a battery's charge, not to recharge a dead battery. Your alternator's job is to maintain a consistent charge on your battery. Draining your car's battery is not advised.

How far can a car go on a dead alternator?

a_2000_se said: 75 - 80 miles sounds pretty good. If your alternator crapped out it might be cheaper to buy a battery and charge the one in the car to get home, depending on the distance, and then install the spare alternator once you got the car home. Might save a tow charge if your stuck on the side of a highway.

Can you still jump start a car with a bad alternator?

While jumpstarting a vehicle with a bad alternator may technically be possible, do not leave jumper cables connected between vehicles longer than necessary as it can result in damage to sensitive electronics.

Related Question How far can you drive on a bad alternator?

How do you drive a car with a bad alternator?

  • Turn off all auxiliary items possible, including the radio, air conditioner or heater, lights and windshield wipers.
  • Avoid driving in high-congested areas. Stop-and-go traffic can drain the battery. Try to find a parking lot to pull into until the traffic is less congested.
  • How do you troubleshoot a bad alternator?

  • Perform a visual inspection under the hood. Look at the belt tension andcondition.
  • Visually inspect and test the batteries.
  • Measure system voltage.
  • Test alternator output.
  • Troubleshoot using the service manual.
  • What could be causing my alternator to go bad?

    Most of the time, alternators fail as a result of age or use. However, some other factors can cause an alternator to fail prematurely. Fluid leaking on the car alternator can commonly lead to failure. Often, engine oil or power steering fluid can work its way into the alternator and cause it to malfunction or fail.

    Can bad alternator drain battery overnight?

    A malfunctioning diode in the alternator can create a parasitic drain on a car's battery. Diodes should allow current to pass in only one direction, but a bad diode will keep the charging circuit open even when the engine in not running, allowing the battery to go dead. This often happens overnight.

    Is 15 volts too high for alternator?

    To answer your question, yes, 15 volts is too high. Most car alternators that charge your battery after every start and provide power while the engine is running are usually regulated to between 13 and 14.0 volts. It will increase in power with increasing voltage.

    What happens if my alternator is putting out too much voltage?

    The build-up of hydrogen gas from an overcharging alternator causes your battery to swell. This also causes the battery to leak highly flammable liquid electrolyte, which is very dangerous.

    What happens if your alternator overcharges?

    Alternators that overcharge will typically produce excess voltage to the battery, making the battery case swell up, become very hot and lose its electrolyte through boiling. Improperly jump-starting the vehicle can send a surge through the battery that destroys one or more cells in the battery or shorts it out.

    How far can you drive without alternator belt?

    There are a few variables involved in the answer, but it should be able to run between 20 to 90 minutes. If it is a hot summer day, your engine can overheat very quickly without the coolant being pumped through the radiator.

    Will my car battery charge while idling?

    The answer is 'YES', yes the car battery does charge while the engine is idling. As long as the mechanical action of the alternator is taking place; that is, being turned by the engine crankshaft. Then the alternator is producing AC current, thereby charging the battery while your car is idling.

    Can alternator work intermittently?

    A related alternator failure is the battery warning light illuminating on a random or intermittent basis because the alternator's carbon brushes are sticking in their holders or are worn out. In this case also, the alternator generally loses about one-third of its charging capacity.

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