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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 A: No Power in All Ignition Switch Positions >> Pinpoint Test A: No Power In All Ignition Switch Positions

Pinpoint Test A: No Power In All Ignition Switch Positions

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. A1 CHECK THE IGNITION SWITCH FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Ignition Switch C250
      • Fig 1: Checking Ignition Switch Harness Voltage
      GF0014270Courtesy of FORD MOTOR CO.
    • Measure the voltage between ground and:
      • ignition switch C250-8, circuit 1050 (LG/VT), harness side.
      • ignition switch C250-9, circuit 1050 (LG/VT), harness side.
    • Are the voltages greater than 10 volts? 
    1. YES  : INSTALL a new ignition switch. REFER to Ignition Switch . TEST the system for normal operation.
    2. NO  : Go to  A2.
  2. A2 CHECK BJB FUSE 1 (30A) FOR VOLTAGE 
      Fig 2: Checking BJB Fuse 1 Voltage
      GF0014271Courtesy of FORD MOTOR CO.
    • Measure the voltage between BJB fuse 1 (30A), input side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : VERIFY BJB fuse 1 (30A) is OK. If OK, REPAIR circuit 1050 (LG/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.
    2. NO  : Go to  A3.
  3. A3 CHECK THE BJB FOR VOLTAGE 
      Fig 3: Checking BJB Voltage
      GF0014272Courtesy of FORD MOTOR CO.
    • Measure the voltage between BJB C1035 eyelet, circuit 2037 (RD), and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new BJB. TEST the system for normal operation.
    2. NO  : REPAIR circuit 2037 (RD). TEST the system for normal operation.
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