How many volts should my alternator be from my battery?
This voltage will be enough to fully charge or maintain the battery on a trickle charge, but charging time will be very long at 13.8 volts. To fully charge in reasonable times, alternator output must be 14.2 V to 14.5 V as measured right across the battery posts.
How many volts is a Subaru Outback battery?
Every 3 to 5 years, but you should have your battery tested frequently for drops in voltage to make sure it’s operating at a high level. Car batteries typically carry 12 to 13 volts unless you have a high-performance battery. Anything higher than 13 volts may indicate a faulty battery.
How many volts is a Subaru battery?
A standard wet battery will read 12.6V when fully charged. To charge the battery, the voltage regulator will set the alternator voltage up to 14V.
How many volts does an alternator generate to recharge the battery when the engine is running?
HOW TO TEST ALTERNATOR CHARGING VOLTAGE. Most alternators that are charging properly should produce a voltage of about 13.8 to 14.2 volts at idle with the lights and accessories off. Always refer to the vehicle manufacturer’s specifications.
How many volts should a battery have?
Fully charged automotive batteries should measure at 12.6 volts or above. When the engine is running, this measurement should be 13.7 to 14.7 volts. If you don’t have a multimeter to tell you the voltage of your battery, you can do a test of your electrical system by starting the car and turning on the headlights.
How can I tell if my alternator is draining my battery?
To do a quick alternator drain power check using your digital multimeter, go to the section Bad Alternator Diode Test below. Then, if your alternator passes the test, do a battery check using a hydrometer tool as described in the Car Battery Hydrometer Test section.
What makes a Subaru Outback battery drain while parked?
Subaru Outback: Battery Draining While Parked 1 Battery Cables. You’ll want to take a look at your Outback’s battery posts where they bolt to the battery. 2 Bad Battery. When the battery drains when parked, the odds are that it’s the battery itself. 3 Alternator. 4 Outback Battery Draining While Parked.
Is the brake light on on my 2018 Outback?
2018 Outback- Brand new!! 2003 Outback, 4cyl. 290,000 miles and still goin’ strong!! 2003 Outback wagon with 283,000 miles. My wife told me “the battery light and brake light are on” after she gets home. No problem. The battery is only a few months old, so I check the voltage.
Is the alternator on my Outback still working?
2018 Outback- Brand new!! 2003 Outback, 4cyl. 290,000 miles and still goin’ strong!! I would say that the chances of the old alternator “going out” without a peep, and this brand new one both being simultaneously defective is a stretch.
What’s the battery voltage on an old alternator?
The old alternator tested good at Autozone. The battery has 11.8 volts now. Turning on the ignition drops that to 11.6. Starting the car drops it to 11.4. The alternator to body voltage with the engine running is 11.4 volts.