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Pinpoint Test C: The Engine Cranks Slowly

WARNING: This page is about a different car, the 2005 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before beginning this test, be sure that the battery is tested and fully charged.
  1. C1 CHECK THE VOLTAGE TO THE STARTER 
    • Key in OFF position.
    • Measure the voltage between starter motor solenoid positive terminal and ground.
      Fig 1: Checking Voltage To Starter Motor Solenoid
      G03888145Courtesy of FORD MOTOR CO.
    • Is the voltage 12.5 volts or greater? 
    • Yes  : GO to C2.
    • No  : REPAIR the circuit between the battery and the starter solenoid. CLEAN and TIGHTEN the connections at the battery terminals. TEST the system for normal operation.
  2. C2 CHECK THE MOTOR GROUND CIRCUIT 
    • Carry out the motor ground circuit test. Refer to the COMPONENT TESTS .
    • Is the ground OK? 
    • Yes  : INSTALL a new starter motor. TEST the system for normal operation.
    • No  : REPAIR the ground circuit as necessary. TEST the system for normal operation.
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