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Home › GMC › 1998 › Forward Control 6.5 F › Repair and Diagnosis › Electrical › Starter › Starting System › On-Vehicle Testing › Solenoid Clicks, Engine Does Not Crank

Solenoid Clicks, Engine Does Not Crank

  1. On diesel models, disconnect fuel injection pump fuel shut off solenoid connector, located on engine, in front of throttle body. On gasoline models, disconnect ignition coil connector, located on bracket at rear of intake plenum. On all models, turn ignition switch to START position for 15 seconds. Using a DVOM, measure voltage between battery positive and negative terminals. If voltage is greater than 9.6 volts, go to next step. If voltage is 9.6 volts or less, perform battery load test. If battery fails load test, replace battery. If battery passes load test, repair or replace starter motor.
  2. Turn ignition switch to START position. Using a DVOM, measure voltage between negative terminal and engine block. If voltage is less than .5 volt, go to next step. If voltage is .5 volt or more, replace battery negative cable and recheck system.
  3. Turn ignition switch to START position. Using a DVOM, measure voltage between battery positive terminal and starter solenoid terminal "B" (Black wire). If voltage is less than .5 volt, repair or replace starter motor. If voltage is .5 volt or more, replace battery positive cable and recheck system.
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