B2 - Base Voltage and No Load Test
^ Connect voltmeter to battery posts. Read battery voltage - this is base reading.
^ Start engine, run at 1500 rpm with no electrical load. Voltage should increase but not more than 2.0 volts.
Increased, but not more than 2.0 volts? -- Go to B3. B3 - Load Test
No increase? -- Go to B5. B5 - Under Voltage Test
Increases more than 2.0 volts? -- Go to B12. B12 - Over Voltage Test