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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 147 (Steering Column Switches) >> Diagnostic Tests >> Steering Column Switches >> Pinpoint Tests >> Pinpoint Test B: No Power in RUN/ACC >> Pinpoint Test B: No Power In Run/Acc

Pinpoint Test B: No Power In Run/Acc

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
  1. B1 CHECK THE IGNITION SWITCH  
    • Carry out the Ignition Switch - Electrical Component Test.
    • Is the ignition switch OK? 
    1. YES  : Go to  B2.
    2. NO  : INSTALL a new ignition switch. REFER to Ignition Switch . CLEAR the DTC. TEST the system for normal operation.
  2. B2 CHECK CIRCUIT 296 (WH/VT) FOR AN OPEN 
    • Disconnect: CJB Fuse 5 (7.5A)
    • Disconnect: CJB Fuse 7 (10A)
    • Disconnect: CJB Fuse 9 (7.5A)
      • Fig 1: Checking Circuit
      GF0014273Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-5, circuit 296 (WH/VT), harness side and:
      • CJB fuse 5 (7.5A), circuit 296 (WH/VT), input side.
      • CJB fuse 7 (10A), circuit 296 (WH/VT), input side.
      • CJB fuse 9 (7.5A), circuit 296 (WH/VT), input side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B3.
    2. NO  : VERIFY CJB fuses 5 (7.5A), 7 (10A) and 9 (7.5A) are OK. If OK, REPAIR circuit 296 (WH/VT). If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. TEST the system for normal operation.
  3. B3 CHECK CIRCUIT 296 (WH/VT) FOR A SHORT TO GROUND 
      Fig 2: Checking Circuit For Short To Ground
      GF0014274Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-5, circuit 296 (WH/VT), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  B4.
    2. NO  : REPAIR circuit 296 (WH/VT). TEST the system for normal operation.
  4. B4 CHECK CIRCUIT 687 (GY/YE) FOR AN OPEN 
    • Disconnect: CJB Fuse 11 (15A)
    • Disconnect: CJB Fuse 13 (10A)
    • Disconnect: CJB Fuse 15 (10A)
    • Disconnect: CJB Fuse 17 (10A)
      • Fig 3: Checking Circuit
      GF0014275Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-7, circuit 687 (GY/YE), harness side and:
      • CJB fuse 11 (15A), circuit 687 (GY/YE), input side.
      • CJB fuse 13 (10A), circuit 687 (GY/YE), input side.
      • CJB fuse 15 (10A), circuit 687 (GY/YE), input side.
      • CJB fuse 17 (10A), circuit 687 (GY/YE), input side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B5.
    2. NO  : VERIFY CJB fuses 11 (15A), 13 (10A), 15 (10A) and 17 (10A) are OK. If OK, REPAIR circuit 687 (GY/YE). If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. TEST the system for normal operation.
  5. B5 CHECK CIRCUIT 687 (GY/YE) FOR A SHORT TO GROUND 
      Fig 4: Checking Circuit For Short To Ground
      GF0014276Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-7, circuit 687 (GY/YE), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  B6.
    2. NO  : REPAIR circuit 687 (GY/YE). TEST the system for normal operation.
  6. B6 CHECK CIRCUIT 1717 (VT/OG) FOR AN OPEN 
    • Disconnect: CJB Fuse 20 (10A)
    • Disconnect: CJB Fuse 22 (10A)
    • Disconnect: CJB Fuse 24 (10A)
    • Disconnect: CJB Fuse 26 (10A)
      • Fig 5: Checking Circuit
      GF0014277Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-1, circuit 1717 (VT/OG), harness side and:
      • CJB fuse 20 (10A), circuit 1717 (VT/OG), input side.
      • CJB fuse 22 (10A), circuit 1717 (VT/OG), input side.
      • CJB fuse 24 (10A), circuit 1717 (VT/OG), input side.
      • CJB fuse 26 (10A), circuit 1717 (VT/OG), input side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B7.
    2. NO  : VERIFY CJB fuses 20 (10A), 22 (10A), 24 (10A) and 26 (10A) are OK. If OK, REPAIR circuit 1717 (VT/OG). If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. TEST the system for normal operation.
  7. B7 CHECK CIRCUIT 1717 (VT/OG) FOR A SHORT TO GROUND 
      Fig 6: Checking Circuit For Short To Ground
      GF0014278Courtesy of FORD MOTOR CO.
    • Measure the resistance between ignition switch C250-1, circuit 1717 (VT/OG), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.
    2. NO  : REPAIR circuit 1717 (VT/OG). TEST the system for normal operation.
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