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Home >> Oldsmobile >> 1966 >> Dynamic Base, Eng CD ML, Standard Trans, Trans Mfr CD 160T >> Repair and Diagnosis (Single Page) >> Electrical >> Charging Systems >> Alternators & Regulators - DELCO-REMY With Integral Regulator >> Description >> Regulator Output Test >> Undercharged Battery Check

Undercharged Battery Check

  1. Turn ignition on, connect voltmeter from generator "BAT" terminal to ground. Zero reading indicates an open between voltmeter connection and battery.
  2. Disconnect wiring harness at No. 1 and No. 2 generator terminals and connect voltmeter from No. 1 harness terminal to ground. Zero reading indicates an open between voltmeter connection and battery.
  3. Connect voltmeter in circuit at generator "BAT" terminal. Run engine at 1500-2000 RPM turn on electrical loads (high beam, windshield wiper, heater, blower, radio, etc.) and observe voltmeter readings. If reading is 12.8 volts or more, generator is O.K. If reading is less than 12.8 volts, ground field winding by inserting screwdriver into end frame test hole. Ground protruding tab to end frame. If voltage increases (13 volts or more), regulator is defective. If voltage does not increase significantly, generator is defective. If voltage regulator is replaced, repeat this test procedure.
    CAUTION: Tab is within 3/4" of casting surface. Do not force screwdriver deeper than one inch into end frame.
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