Toyota Tundra Battery Voltage

As your Tundra begins to eat through the voltage.

Toyota tundra battery voltage. With the high beams on and the heater fan on high 2000. 2020 Tundra DC SR5 Barcelona. If your Toyota Tundras battery light is on it means a few things.

Dimming headlights are one of the most common signs of a bad alternator in the Toyota Tundra. I have put my amp meter in series between the negative battery post and the negative cable and I measure 50mA with the truck off. It could be a bad battery or more likely a bad battery cable too.

I have pulled every fuse one at a time and still get 50mA. According to Toyota a dynamic battery state of charge SOC and state of health SOH test can be performed with the aid of a simple voltmeter. Dim headlights indicate that the alternator cant keep up with the energy request for the lights.

Voltage should be 132 to 148 at 2000 rpm ten amps or less. These trucks are voltage regulated. No other signs that Ive got a battery or charging system issue.

Every day up until a few days ago my battery gauge was pegged right in the middle at 14 volts and never varied I never threw a meter on it until today though. The charging system itself is relatively simple. Once home I checked the battery and then the alternator.

Apparently AGM batteries require higher voltages than lead-acid batteries to charge and our alternators dont put out enough. If your battery is draining while driving it is almost without exception the Tundras alternator that is causing the problem. Placing a diode in place of the Alt-S alternator sensing circuit fuse tricks the alternator into seeing less voltage than the battery.