Charging System - General Information

• Specifications
  • General Specifications
• Description And Operation
  • Charging System
    • Notes
    • Generator(s)
      • Notes
      • Single Generator
      • Dual Generator
    • Battery
• Diagnosis And Testing
  • Charging System
    • Notes
    • Special Tool(s)
    • Principles of Operation
      • Notes
      • Functionality
      • Positive Battery Output (B+) Circuit 38 (BK/OG) (Gas) / Circuit 1119 (RD) (Diesel)
      • I Circuit 904 (LG/RD) Single Generator
      • S Circuit 4 (WH/BK) (Gas)
      • A Circuit 35 (OG/LB)
    • Inspection and Verification
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test A: The Battery is Discharged or Battery Voltage is Low
        • Normal Operation
        • Possible Causes
        • Pinpoint Test A: The Battery Is Discharged Or Battery Voltage Is Low
      • Pinpoint Test B: The Charging System Warning Indicator is On With the Engine Running (The Charging System Voltage Does Not Increase)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test B: The Charging System Warning Indicator Is On With The Engine Running (The Charging System Voltage Does Not Increase)
      • Pinpoint Test C: The Charging System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test C: The Charging System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
      • Pinpoint Test D: The Charging System Warning Indicator is On with the Engine Running and the Battery Increases Voltage
        • Normal Operation
        • Possible Causes
        • Pinpoint Test D: The Charging System Warning Indicator Is On With The Engine Running And The Battery Increases Voltage
      • Pinpoint Test E: The Charging System Warning Indicator is Off With the Ignition Switch in the RUN Position and the Engine Off
        • Normal Operation
        • Possible Causes
        • Pinpoint Test E: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Off
      • Pinpoint Test F: The Charging System Warning Indicator Flickers or is Intermittent
        • Normal Operation
        • Possible Causes
        • Pinpoint Test F: The Charging System Warning Indicator Flickers Or Is Intermittent
      • Pinpoint Test G: The Generator is Noisy
        • Normal Operation
        • Possible Causes
        • Pinpoint Test G: The Generator Is Noisy
      • Pinpoint Test H: Radio Interference
        • Normal Operation
        • Possible Causes
        • Pinpoint Test H: Radio Interference
    • Component Tests
      • Battery - Drain Tests
      • Generator On-Vehicle Tests
      • Generator On-Vehicle Tests - Load Test
      • Generator On-Vehicle Tests - No-Load Test
  • Charging System - Dual Generators
    • Notes
    • Special Tool(s)
    • Principles of Operation
      • Notes
      • Functionality
      • Positive Battery Output (B+) Circuit 1119 (RD) (Upper Generator), 2037 (RD) (Lower Generator)
      • I Circuit - Dual Generator
      • A Circuit 35 (OG/LB)
    • Inspection and Verification
    • Symptom Chart
    • Pinpoint Tests
      • Pinpoint Test I: The Charging System Warning Indicator is on With the Engine Running (The Charging System Voltage Does Not Increase)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test I: The Charging System Warning Indicator Is On With The Engine Running (The Charging System Voltage Does Not Increase)
      • Pinpoint Test J: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position and The Engine Off
        • Normal Operation
        • Possible Causes
        • Pinpoint Test J: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Off
      • Pinpoint Test K: The Charging System Warning Indicator Is On With The Engine Running and The Battery Increases Voltage
        • Normal Operation
        • Possible Causes
        • Pinpoint Test K: The Charging System Warning Indicator Is On With The Engine Running And The Battery Increases Voltage
      • Pinpoint Test L: The Charging System Warning Indicator Operates Correctly and The Battery Voltage Does Not Increase
        • Normal Operation
        • Possible Causes
        • Pinpoint Test L: The Charging System Warning Indicator Operates Correctly And The Battery Voltage Does Not Increase
      • Pinpoint Test M: The Battery Is Discharged or Battery Voltage Is Low
        • Normal Operation
        • Possible Causes
        • Pinpoint Test M: The Battery Is Discharged Or Battery Voltage Is Low
      • Pinpoint Test N: The Charging System Warning Indicator Flickers or Is Intermittent
        • Normal Operation
        • Possible Causes
        • Pinpoint Test N: The Charging System Warning Indicator Flickers Or Is Intermittent
      • Pinpoint Test O: The Charging System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test O: The Charging System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
      • Pinpoint Test P: Battery Leakage or Damage
        • Normal Operation
        • Possible Causes
        • Pinpoint Test P: Battery Leakage Or Damage
      • Pinpoint Test Q: The Voltage Gauge Reads High or Low
        • Normal Operation
        • Possible Causes
        • Pinpoint Test Q: The Voltage Gauge Reads High Or Low
      • Pinpoint Test R: The Generator(s) is Noisy
        • Normal Operation
        • Possible Causes
        • Pinpoint Test R: The Generator(S) Is Noisy
      • Pinpoint Test S: Radio Interference
        • Normal Operation
        • Possible Causes
        • Pinpoint Test S: Radio Interference
      • Pinpoint Test T: Dual Generator Upper Fault Detected (P0620)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test T: Dual Generator Upper Fault Detected (P0620)
      • Pinpoint Test U: Dual Generator Lower Fault Detected (P1148)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test U: Dual Generator Lower Fault Detected (P1148)
      • Pinpoint Test V: Dual Generator Lower Circuit Fault Detected (P1149)
        • Normal Operation
        • Possible Causes
        • Pinpoint Test V: Dual Generator Lower Circuit Fault Detected (P1149)
    • Component Tests
      • Battery - Drain Testing
      • Generator On-Vehicle Tests
      • Generator On-Vehicle Test - Load Test
      • Generator On-Vehicle Test - No-Load Test