GM Service Manual Online
For 1990-2009 cars only

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to the following:

   •  Starting System Description
   •  Starting System Circuit Description
   •  Charging System Description
   •  Charging System Circuit Description
   •  Ignition System Description

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the starting, charging or ignition systems. Refer to Checking Aftermarket Accessories in Wiring Systems.
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
    • Inspect the battery for correct installation and physical damage.
    • Test the condition of the battery. Terminal voltage should be 11.5-13.5 volts.
    • Inspect the wiring for damage. Inspect the connections to the starter motor, the starter solenoid, the ignition switch, the battery and all related ground points.
    • If the battery, wiring and switches are in satisfactory condition and the engine is known to be functioning properly, remove and test the starter motor. Refer to Starter No Load Test .
    • When the charging system is operating normally, the charge indicator lamp will come on when the ignition switch is turned on and will go out when the engine starts.
    • Inspect the generator for loose or improper mounting and the generator drive belt for correct installation.
    • Inspect the generator drive belt for correct installation. Refer to Drive Belt Replacement in Engine Mechanical 1.6 L or Drive Belt Replacement in Engine Mechanical 2.0 L.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

    •  Battery Common Causes of Malfunction
    •  Battery Check
    •  Battery Terminal Check
    •  Battery Hydrometer Displays Yellow Dot
    •  Battery Not Operating Properly
    •  Battery Electrical Drain/Parasitic Load
    •  Battery Hydrometer Displays Dark or Yellow Dot
    •  Battery Load Test
    •  Battery Electrical Drain/Parasitic Load Test
    •  Battery Is Undercharged or Overcharged
    •  Charge Indicator Always On
    •  Charge Indicator Inoperative
    •  Engine Cranks/Cranks Slowly, but Does Not Start
    •  Generator Noise Test
    •  Starter Motor Noise Diagnosis
    •  Starter No Load Test
    •  Starter Solenoid Does Not Click
    •  Spark Plug Visual Diagnosis