F 250 2WD Pickup V8-6.9L DSL (1985)
Voltage Regulator: Specifications
Measure battery voltage and record figure. With engine operating off idle and all secondary electrical systems turned off, regulated voltage should be no
greater than 2 volts above recorded figure. Turn on headlights and set heater blower to high. Regulated voltage off idle should be no less than 0.5 volts
above recorded figure.