No-Load Voltage, Checking

No-load Voltage, Checking


CAUTION!
- Battery cell caps must be screwed in tightly when charging, measuring voltage or performing load tests.
- Always comply with the following instructions otherwise a correct measurement cannot be assured.


Special tools, test equipment and auxiliary items
- VAG1715 multimeter or
- VAG1362 mini tester or
- Multimeter (Fluke 83 or equivalent)


NOTE:
- When testing the no-load voltage of a battery installed in a vehicle, make sure the battery Ground (GND) strap is disconnected.
- The battery must not have been under a load for at least two hours before the test.
- The battery must not have been charged at least two hours before the test.


Use the following procedure for testing the voltage of a battery which is not under load:
- Switch ignition off.
- Disconnect battery Ground strap.
- Measure voltage between battery terminals.
- 12.5 volts or higher: battery OK
- Below 12.5 volts: recharge battery immediately