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Pinpoint Test G: The Charge System Warning Indicator Is Never On

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
  1. G1 CHECK THE CHARGE SYSTEM WARNING INDICATOR 
    • Key in ON position.
    • Observe the charge system warning indicator.
    • Key in START position.
    • Does the charge system warning indicator illuminate when the ignition switch is in the ON position, and turn off when the ignition switch is in the RUN position? 
    1. Yes  : System is operating correctly at this time.
    2. No  : GO to G2.
  2. G2 CHECK CIRCUIT 904 (LG/RD) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Generator C102a.
    • Disconnect: Instrument Cluster C220a.
    • For 2.3L engines, measure the resistance between the instrument cluster C220a pin 20, circuit 904 (LG/RD), harness side and the generator C102a pin 1, circuit 904 (LG/RD), harness side.
      Fig 1: Checking Circuit 904 (LG/RD) For Open - 2.3L Engines
      G03277042Courtesy of FORD MOTOR CO.
    • For 3.0L and 4.0L engines, measure the resistance between the instrument cluster C220a pin 20, circuit 904 (LG/RD), harness side and the generator C102a pin 1, circuit 904 (LG/RD), harness side.
      Fig 2: Checking Circuit 904 (LG/RD) For Open - 3.0L & 4.0L Engines
      G03277043Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : GO to G3.
    2. No  : REPAIR the circuit. TEST the system for normal operation.
  3. G3 CHECK CIRCUIT 904 (LG/RD) FOR A SHORT TO POWER 
    • Measure the voltage between the instrument cluster C220a pin 20, circuit 904 (LG/RD), harness side and ground.
      Fig 3: Checking Circuit 904 (LG/RD) For Short To Power
      G03277044Courtesy of FORD MOTOR CO.
    • Key in ON position.
    • Is voltage present? 
    1. Yes  : REPAIR the circuit. TEST the system for normal operation.
    2. No  : GO to G4.
  4. G4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION 
    • Disconnect all instrument cluster connectors.
    • Check for:
    • Corrosion
    • Pushed-out pins
    • Incorrectly installed bulb sockets
    • Burnt-out bulbs
    • Connect all instrument cluster connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. Yes  : INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . CLEAR the DTCs. REPEAT the self-test.
    2. No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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