GM Service Manual Online
For 1990-2009 cars only

Electrical Information Reference

    •  Circuit Testing
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs
    •  Battery Inspection/Test
    •  Diagnostic System Check - Vehicle
  1. Preform the Diagnostic System Check - Vehicle.
  2. Preform the battery inspection/test Battery Inspection/Test.

  3. Object Number: 1949865  Size: SH
  4. Connect a DMM to the battery record reading.

  5. Object Number: 1949872  Size: SH
  6. Connect a DMM set to volts between the positive battery cable (1) at starter motor and a known ground (2).
  7. If voltage varies more than 1 volt from the battery voltage check circuit for open/high resistance.

    Object Number: 1949874  Size: SH
  8. Connect a DMM set to volts between the starter motor solenoid supply cable (1) and a known ground (2)
  9. Turn key to start position. If voltage varies more than 1 volt from the battery voltage check circuit for open/high resistance.
  10. If the voltage is within range replace starter motor.

Repair Instructions

Starter Motor Replacement.