## How many volts should my alternator be from my battery?

A car alternator needs to be putting out at least 13-14 volts (ideally between 13.8 and 14.2 volts) to effectively charge a 12 volt car battery. If the alternator is putting out too much voltage (15+ volts), it is likely your battery acid will boil over out of the battery.

## Is 14.7 volts too high for alternator?

Charging voltages over 14.7 volts can prematurely dry the battery by boiling out electrolyte, and increase risk of a battery hydrogen gas explosion. Less than 14.3 would be a “weak” alternator or regulator. Much less than 14.2 at a fast idle is bad wiring, bad alternator or regulator, or a bad connection or fuse link.

What should battery voltage be while idling?

Additionally, once the engine is running, the battery should be receiving a charge from the alternator. Because of this, the multimeter should read between 13.8 and 14.5 volts when the engine is at idle.

### What does it mean if the voltage is above 12.6 volts when the car is running?

A fully charged battery will typically display a voltmeter reading of about 12.6 to 12.8 volts. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage.

### What voltage is too high for alternator?

Higher than 15 volts indicates a fault in the charging system’s voltage regulator or related circuits. If it’s substantially excessive, this can cause electrical system and/or battery damage.

What voltage is too low for a 12 volt battery?

12.0 volts or below – At 12.0 volts your battery is considered to be fully discharged or ‘flat’ and should be recharged as soon as possible. The lifespan of your battery will be severely affected if it remains within this voltage range for extended periods of time.

## At what voltage will a car not start?

In general, while both the engine and the generator are in the working state, the voltage of the battery should be within 13.7 – 14.2V. If more, then it is harmful to the battery, if less, then it is not fully recharged.

## How do you check an alternator on a Acura TL?

Procedure

1. Park your ACURA in a safe area.
2. Pull the hood release under the dashboard and open the hood.
3. Locate the battery.
4. Connect the red clamp on the positive battery terminal.
5. Connect the negative clamp on the negative terminal.
6. Perform a battery and alternator test procedure.

How to test Acura battery, alternator, charging system?

Connect the red clamp on the positive battery terminal. Connect the negative clamp on the negative terminal. Perform a battery and alternator test procedure. Your local auto parts store may offer free battery and charging system testing. The alternator won’t charge the battery.

### Where are the battery terminals on an Acura?

Newer ACURA have a plastic cover on top of the battery. If necessary, remove the cover to access the positive and negative terminals of the battery. Connect the red clamp on the positive battery terminal.

### Why is my Acura Battery Light not working?

If your ACURA battery light stays ON or your ACURA won’t start, the problem may be due to electrical issues. ACURA electrical issues can be tricky and challenging to figure out. The first step in troubleshooting ACURA battery problems is to check the charging system, including the operation of the battery and alternator.

Why does my Acura TL run at 2K rpm?

Vehicle is a 2000 Acura TL. EDIT: Problem was fixed, it was the ground cable. The connection was corroded very badly — keep your grounds CLEAN. This improved my car 100%, everything in the car is controlled by electronics, now that it has proper supply its great. Run the engine at 2k RPM.