Electrical Checks

If the preliminary inspection shows components to be in good condition, make the following electrical checks (See Figures 5-9 and 5-10.)

1 Regulating Voltage Check. Connect an ammeter in series with the alternator output (blue wire terminal at battery). Connect load rheostat (carbon pile) and voltmeter across battery. Check regulating voltage while running engine at 3600 rpm.

Turn load rheostat (or carbon pile) to off position. With engine and module stabilized at operating temperature voltage reading should be between 13 8 and 15.0 volts at 3.5 amperes output with 75° air temperature measured near the regulator thermistor (in wire).

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