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:

   •  Battery Description and Operation
   •  Starting System Description and Operation
   •  Charging System Description and Operation

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the starting, charging, or ignition systems. Refer to Checking Aftermarket Accessories .
    • 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. Refer to Battery Inspection/Test .
    • 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.
    • 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 .

Intermittent

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

Symptom List

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

    •  Battery Inspection/Test
    •  Battery Charging
    •  Battery Electrical Drain/Parasitic Load Test
    •  Battery Common Causes of Malfunction
    •  Charging System Test
    •  Charge Indicator Always On
    •  Charge Indicator Inoperative
    •  Generator Noise Diagnosis
    •  Starter Solenoid Does Not Click
    •  Starter Solenoid Clicks, Engine Does Not Crank
    •  Engine Cranks Slowly
    •  Starter Motor Noise Diagnosis