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Test B: Engine Cranks Slowly

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  1. Verify battery condition. Battery voltage should be 12 volts or more. Load test battery at approximately one-half cold cranking amperage rating. See load tester manufacturer's instructions. If battery voltage is less than 12 volts or loaded battery voltage is less than 9.6 volts, service battery or charging system as necessary.
  2. Turn ignition switch to OFF position. Using DVOM, check voltage between starter motor solenoid terminal "B" and ground. See Figure. If voltage is greater than 12.5 volts, go to next step. If voltage is 12.5 volts or less, repair or replace positive battery cable or connections between battery and starter solenoid. Recheck system operation.
  3. Perform starter motor ground circuit test. See VOLTAGE DROP TEST - MOTOR GROUND CIRCUIT . If ground is okay, replace starter motor and test system operation. If ground is not okay, repair ground circuit and test system operation. See WIRING DIAGRAMS .
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