Why is my alternator charging too high?
Why is my alternator charging too high?
When the wrong alternator has been installed in a stock vehicle or if the pulley has undersized dimensions (causing extra alternator rotation), the charging supply will be higher than the demand and cause an overcharged state. High performance or racing alternators should not be installed on stock passenger vehicles.
What is the voltage of an alternator while charging?
Someone check me on this, but the battery voltage while charging is the no load voltage (12.6 volts at room temp) plus the IR drop of the charging current over the internal resistance of the battery. so if you are charging at 50 amps and the Ri is 0.04 ohms, then the drop is 2 volts and the battery voltage is 14.6 volts.
Why is my alternator putting out 17 volts?
Why is my alternator putting out 17 volts? It may be that the regulator is packing up and the alternator is going to max. unregulated output because of a bad battery output voltage (alternator input) connection between the battery and the alternator.
Can a good alternator run over 14.5vdc?
I won’t say a good alternator will “never” charge at 16.5vdc, but keeping it there for any length of time will boil the battery very quickly. Your line of thinking is correct in that a good alternator should be charging in the 14.1-14.5vdc as long as there’s no major load on it. If there is, the voltage will be down some from this.
When does the alternator light turn on the battery?
On older vehicles, the battery light would turn on the alternator light when the alternator output or battery voltage dropped below a preset value. The battery light on modern vehicles, however, is controlled by data and trouble codes. This is why a scan tool is essential to diagnosing a charging system.
Someone check me on this, but the battery voltage while charging is the no load voltage (12.6 volts at room temp) plus the IR drop of the charging current over the internal resistance of the battery. so if you are charging at 50 amps and the Ri is 0.04 ohms, then the drop is 2 volts and the battery voltage is 14.6 volts.
How many volts should an alternator put out at idle?
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. Click to see full answer
I won’t say a good alternator will “never” charge at 16.5vdc, but keeping it there for any length of time will boil the battery very quickly. Your line of thinking is correct in that a good alternator should be charging in the 14.1-14.5vdc as long as there’s no major load on it. If there is, the voltage will be down some from this.
Why is my alternator putting out 17 volts? It may be that the regulator is packing up and the alternator is going to max. unregulated output because of a bad battery output voltage (alternator input) connection between the battery and the alternator.
