How many volts should a Subaru alternator put out?
The standard Subaru alternator should output around 14 volts when the engine is running. This voltage range ensures the alternator is properly charging the vehicle's battery and powering the electrical systems. However, the exact voltage output can vary depending on factors like the model year, engine size, and driving conditions.
Understanding Subaru Alternator Voltage Output
The alternator in a Subaru vehicle is responsible for generating the electrical power needed to charge the battery and run the various electrical components. A properly functioning alternator should maintain a voltage output between 13.5 and 14.5 volts when the engine is running at normal operating temperatures.
- Typical Voltage Output: 13.5 to 14.5 volts
- Ideal Voltage Output: Around 14 volts
- Voltage Range Factors: Model year, engine size, driving conditions
It's important to note that the alternator voltage output can fluctuate slightly based on factors like engine speed, electrical load, and battery condition. However, the voltage should remain within the 13.5 to 14.5 volt range to ensure the battery is being properly charged and the electrical systems are functioning correctly.
Diagnosing Alternator Issues
If the alternator voltage output is outside the normal range, it could indicate a problem with the alternator or the vehicle's electrical system. Some common signs of alternator issues include:
- Battery not charging: If the battery is not maintaining a full charge, it could be a sign of an alternator problem.
- Dimming headlights: Alternator issues can cause the vehicle's headlights to dim or flicker when the engine is running.
- Battery warning light: The battery warning light on the dashboard may illuminate if the alternator is not providing enough voltage to the battery.
If you suspect an issue with your Subaru's alternator, it's best to have a professional technician diagnose and repair the problem to ensure the electrical system is functioning properly and the battery is being charged correctly.
What is the maximum car alternator output voltage?
14.5 volts
The alternator in an automobile produces a minimum of 13 volts. The maximum voltage production should be 14.5 volts. The alternator generally lasts about 100,000 miles. After this time, the alternator can start to malfunction and make growling noises in the engine.
What are the signs of a bad alternator?
How Do You Know if a Car Alternator is Bad?
- Trouble starting your car.
- Frequent stalling.
- Whining or screeching noise after the vehicle starts.
- Dim or overly bright lights.
- Smell of burning rubber or wires.
- Dead battery.
- Battery dashboard warning light is on.
At what voltage is an alternator bad?
If the noted value is excessively high (greater than 15V), it may indicate that the alternator's voltage regulator has gone bad. If the reading is lower than 13V: The engine idle speed may be inadequate for the alternator to produce sufficient voltage.
What is the best way to check if your alternator is bad?
Voltage Testing
With the engine off, you should get a reading around 12 volts. Now start the engine – the voltage reading should increase to between 13.5-15 volts. If it stays around 12 volts, that indicates your alternator is not charging properly.
How to tell if a Subaru alternator is bad?
How to Tell When Your Subaru Needs an Alternator Repair
- Electrical Power Falters.
- Battery Fails to Recharge.
- Engine Losses Power.
- Dashboard Warns You.
How long do Subaru alternators last?
How Long Do Subaru Alternators Last? Subaru alternators typically last around seven years or more, often exceeding 100,000 miles.
What if my alternator is putting out too much voltage?
An overcharging alternator is typically caused by a defective or malfunctioning voltage regulator or transistor, and can result in flickering lights, a battery dashboard warning light, reduced lifespan of bulbs, blown fuses and relays, and a bulging battery.
How many volts should a alternator kick out?
Output voltage should be around 14 volts (13.8 to 14.5 depending upon the application) with the engine running. If you check the voltage at the battery under the same parameters, you should not have more than a half volt drop between your result at the alternator and the result at the battery.
How many amps is a Subaru alternator?
130 Amp
(130 Amp) Alternator For Subaru Crosstrek (2.0L) 2018 2019 2020 2021.
What is the output voltage of a Subaru alternator?
Also, make sure that the connection of the alternator output wire is tight and not corroded. During charging (with the alternator at full output), you should see no less than about 13.8 volts across the terminals (+ and ground) of the battery, and no more than about 14.2 volts.
