Alternator Output

Install battery post adapter switch on battery positive terminal post, connect test set as shown in illustration. Make certain voltmeter set to correct scale (16-20 volt range) and polarity switch in negative position.
Close adapter switch and start engine, adjust engine speed to approximately 2000 RPM., open adapter switch. Make certain all lights and accessories turned off.
Adjust control knob on test unit until maximum ammeter reading is obtained. Add 5 amperes to indicated reading. This total should be equal to specified alternator output (see Specifications).
If rated output not obtained in above test, check regulator performance (see Prestolite Transistorized Regulator). If trouble not caused by defective regulator, check field circuit (following).

Without disturbing test leads, disconnect field lead from alternator terminal, connect jumper wire between this terminal and field rheostat terminal, connect other field rheostat terminal to alternator output terminal. With battery adapter switch open, rotate field rheostat knob fully clockwise to "direct" position. Ammeter will indicate field current of approximately 2 amperes (see Field Current Specifications). If ammeter reading is low, defective brushes or rotor field winding is indicated. Rotate field control rheostat back to full counterclockwise or open position before disconnecting test leads.

Alternator Specifications

Alternator No.	Amperes	Volts
ALK-6309, 6310, 6311	35	14.2
ALE-6305, 6306	40	14.2
Am. Mot. 31 95534(5)	35	14.2

Alternator Field Current

Alternator No.	Amperes	Volts
ALK-6309, 6310, 6311	.2.3-2.4	10.0
ALE-6305, 6306	2.4-2.5	10.0
Am. Mot. 3195534(5)	2.4-2.5	10.0