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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 942 (Instrument Cluster System And Panel Illumination) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: One Or More Illumination Source(s) Is Inoperative >> Pinpoint Test E: One Or More Illumination Source(S) Is Inoperative

Pinpoint Test E: One Or More Illumination Source(S) Is Inoperative

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
  1. E1 CHECK THE INOPERATIVE ILLUMINATION SOURCE 
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
    • Observe the illumination.
    • Are all of the illumination sources inoperative? 
    1. YES  : Go to Pinpoint Test A .
    2. NO  : If the headlamp switch illumination is inoperative, go to  E2 .

      If the 4WD mode switch illumination is inoperative, go to  E4 .

      If the speed control switch(es) illumination is inoperative, go to  E6 .

  2. E2 CHECK CIRCUIT VLN18 (BU/WH) FOR AN OPEN AT THE HEADLAMP SWITCH 
    • Disconnect: Headlamp Switch C205
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
      • Fig 1: Measuring Voltage Between Headlamp Switch C205-8, Circuit VLN18 (BU/WH) & Ground
      GF0010965Courtesy of FORD MOTOR CO.
    • Measure the voltage between the headlamp switch C205-8, circuit VLN18 (BU/WH), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. E3 CHECK CIRCUIT GD161 (BK/YE) FOR AN OPEN AT THE HEADLAMP SWITCH 
      Fig 2: Measuring Resistance Between Headlamp Switch C205-3, Circuit GD161 (BK/YE) & Ground
      GF0010966Courtesy of FORD MOTOR CO.
    • Measure the resistance between the headlamp switch C205-3, circuit GD161 (BK/YE), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new headlamp switch. REFER to EXTERIOR LIGHTING . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. E4 CHECK CIRCUIT VLN18 (BU/WH) FOR AN OPEN AT THE 4WD MODE SWITCH 
    • Disconnect: 4WD Mode Switch C284
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
      • Fig 3: Measuring Voltage Between 4WD Mode Switch C284-1, Circuit VLN18 (BU/WH) & Ground
      GF0010967Courtesy of FORD MOTOR CO.
    • Measure the voltage between the 4WD mode switch C284-1, circuit VLN18 (BU/WH), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. E5 CHECK CIRCUIT GD161 (BK/YE) FOR AN OPEN AT THE 4WD MODE SWITCH 
      Fig 4: Measuring Resistance Between 4WD Mode Switch C284-4, Circuit GD161 (BK/YE) & Ground
      GF0010968Courtesy of FORD MOTOR CO.
    • Measure the resistance between the 4WD mode switch C284-4, circuit GD161 (BK/YE), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new 4WD mode switch. REFER to FOUR WHEEL DRIVE (4WD) SYSTEMS . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. E6 CHECK THE SPEED CONTROL ACTUATOR SWITCH ILLUMINATION 
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
    • Observe both speed control actuator switches.
    • Are both speed control actuator switches illumination inoperative? 
    1. YES  : Go to  E7.
    2. NO  : INSTALL a new speed control actuator switch. REFER to SPEED CONTROL . TEST the system for normal operation.
  7. E7 CHECK FOR POWER TO THE SPEED CONTROL SWITCHES 
    • Deactivate the supplemental restraint system (SRS). Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
    • Disconnect: Upper Clockspring Connector
    • Place the headlamp switch in the PARKING LAMPS ON position.
      • Fig 5: Measuring Voltage Between Upper Clockspring Connector, Pin 2, Component Side & Ground
      GF0010969Courtesy of FORD MOTOR CO.
    • Measure the voltage between the upper clockspring connector, pin 2, component side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E8.
    2. NO  : Go to  E10.
  8. E8 CHECK THE CLOCKSPRING GROUND CIRCUIT 
      Fig 6: Measuring Resistance Between Upper Clockspring Connector, Pin 1 & Steering Column Ground
      GF0010970Courtesy of FORD MOTOR CO.
    • Measure the resistance between the upper clockspring connector, pin 1, and the steering column ground.
    • Is the resistance less than 5 ohms ? 
    1. YES  : INSTALL a new steering wheel control switch(es). REFER to SPEED CONTROL . TEST the system for normal operation. REACTIVATE the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
    2. NO  : Go to  E9.
  9. E9 CHECK CIRCUIT GD174 (BK/WH) FOR AN OPEN 
    • Disconnect: Clockspring C218a
      • Fig 7: Measuring Resistance Between Clockspring C218A-5, Circuit GD174 (BK/WH) & Ground
      GF0010971Courtesy of FORD MOTOR CO.
    • Measure the resistance between the clockspring C218a-5, circuit GD174 (BK/WH), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E11.
    2. NO  : REPAIR the circuit. TEST the system for normal operation. REACTIVATE the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  10. E10 CHECK CIRCUIT VLN18 (BU/WH) FOR AN OPEN AT THE CLOCKSPRING 
    • Disconnect: Clockspring C218a
      • Fig 8: Measuring Voltage Between Clockspring C218A-4, Circuit VLN18 (BU/WH) & Ground
      GF0010972Courtesy of FORD MOTOR CO.
    • Measure the voltage between the clockspring C218a-4, circuit VLN18 (BU/WH), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . TEST the system for normal operation. REACTIVATE the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
    2. NO  : REPAIR the circuit. TEST the system for normal operation. REACTIVATE the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
  11. E11 CHECK THE STEERING WHEEL CONTROL SWITCH HARNESS 
    • Inspect the steering wheel control switch harness for shorts, opens or damage.
    • Is the steering wheel control switch harness OK? 
    1. YES  : INSTALL a new steering wheel control switch(es). TEST the system for normal operation. REACTIVATE the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
    2. NO  : INSTALL a new steering wheel control switch harness. TEST the system for normal operation. REACTIVATE the SRS. REFER to SUPPLEMENTAL RESTRAINT SYSTEM .
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