Battery No-Load Test

1. Connect Rotunda 88 Digital Multimeter 105-R0053, or equivalent to monitor engine speed.
2. Connect the leads of Rotunda 73 Digital Multimeter 105-R0051, or equivalent, across the battery terminals.
3. Read the voltage (base voltage).
4. Start the engine.
5. Run the engine at 1500 rpm with no electrical load.
6. Read the voltage. The voltage should be in the range of 14.1 to 14.7 volts. If the voltage increase is less than 2.5 volts over the base voltage, perform the Load Test. Battery Load Test
If there is no voltage increase or the voltage increase is greater than 2.5 volts, perform the generator component tests. Generator Testing