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Pinpoint Test C: No Power In Run

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. C1 CHECK THE POWER SUPPLY TO THE IGNITION SWITCH 
    • Key in OFF position.
    • Disconnect: Ignition Switch C250.
    • Measure the voltage between the ignition switch C250, harness side and ground as follows:
      Ignition Switch C250 Circuit
      Pin B1 37 (YE)
      Pin B2 37 (YE)
      Pin B4 37 (YE)
      Pin B5 37 (YE)
      Fig 1: Checking Power Supply To Ignition Switch
      G03273396Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. Yes  : GO to C2.
    2. No  : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  2. C2 CHECK THE IGNITION SWITCH 
    • Carry out the ignition switch component test;

      Refer to the appropriate COMPONENT TESTING article for schematic and connector information.

    • Does the ignition switch test OK ? 
    1. Yes  : GO to C3.
    2. No  : INSTALL a new ignition switch. REFER to IGNITION SWITCH . CLEAR the DTCs. REPEAT the self-test.
  3. C3 CHECK THE POWER SUPPLY TO THE SJB 
    • Disconnect: SJB C2280b.
    • Disconnect: SJB C2280c.
    • Connect: Ignition Switch C250.
    • Key in ON position.
    • Measure the voltage between the SJB connectors, harness side and ground as follows:
      SJB Connectors Circuit
      C2280b pin 17 687 (GY/YE)
      C2280b pin 29 1050 (LG/VT)
      C2280c pin 32 297 (BK/LG)
      Fig 2: Checking Power Supply To SJB
      G03273397Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    1. Yes  : GO to C4.
    2. No  : REPAIR the circuit(s) in question. CLEAR the DTCs. REPEAT the self-test.
  4. C4 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all SJB connectors.
    • Check for:
      • Corrosion
      • Pushed-out pins
    • Connect all SJB 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 SJB. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . TEST the system for normal operation.
    2. No  : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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