With the engine running connect a DMM (Digital Multimeter - DC Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
-
You can also measure the battery voltage ''without the engine running''. A good battery should read between 12VDC - 12.5VDC, even 11.5VDC is passable but definitely not less.
+
You can also measure the battery voltage ''without the engine running''. A good battery should read between 12VDC - 12.5VDC, even 11.5VDC is passable but definitely not less. It may be reading low due to not being charged by the alternator and will be OK when being properly charged
With the engine running connect a DMM (Digital Multimeter - DC Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
-
You can also measure the battery voltage ''without the engine running''. A good battery should read close to 12VDC, even 11.5VDC is passable but definitely not less.
+
+
You can also measure the battery voltage ''without the engine running''. A good battery should read between 12VDC - 12.5VDC, even 11.5VDC is passable but definitely not less.
With the engine running connect a DMM (Digital Multimeter - DC Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
+
You can also measure the battery voltage ''without the engine running''. A good battery should read close to 12VDC, even 11.5VDC is passable but definitely not less.
With the engine running connect a DMM (Digital Multimeter - DC Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
With the engine running connect a DMM (Digital Multimeter -Voltmeter function) across the battery terminals.
+
With the engine running connect a DMM (Digital Multimeter - DC Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
With the engine running connect a DMM (Digital Multimeter -Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
With the engine running connect a DMM (Digital Multimeter -Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
-
Anything less than 13.8V means that the battery is being discharged when the engine is running because the alternator cannot supply the electrical power.
+
Anything less than 13.8V means that the battery is being discharged, not being charged, when the engine is running because the alternator cannot supply the electrical power so the extra power is coming from the battery.
Hi,
Check the alternator output.
With the engine running connect a DMM (Digital Multimeter -Voltmeter function) across the battery terminals.
<<<<<<<<<<<'''Be safety aware - the engine is running'''>>>>>>>>>>>>
The voltage reading should be between 13.8VDC - 14.2VDC.
Anything less than 13.8V means that the battery is being discharged when the engine is running because the alternator cannot supply the electrical power.