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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 936 (Instrument Cluster System And Panel Illumination (F250-F550)) >> Diagnostic Tests >> Instrument Cluster and Panel Illumination >> Pinpoint Tests >> Pinpoint Test F: A Single Illumination Source Is Inoperative - Steering Wheel Switches >> Pinpoint Test F: A Single Illumination Source Is Inoperative - Steering Wheel Switches

Pinpoint Test F: A Single Illumination Source Is Inoperative - Steering Wheel Switches

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. 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. F1 CHECK CIRCUIT 19 (LB/RD) FOR AN OPEN 
    • Deactivate the air bag system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM article.
    • Key in OFF position.
    • Disconnect: Clockspring C218a
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
    • Measure the voltage between the clockspring C218a-6, circuit 19 (LB/RD), harness side and ground.
      • Fig 1: Checking Circuit 19 (LB/RD) For Open
      GF0008151Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  F2.
    2. NO  : REPAIR the circuit. TEST the system for normal operation. REACTIVATE the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
  2. F2 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Place the headlamp switch in the OFF position.
    • Measure the resistance between the clockspring C218a-5, circuit 57 (BK), harness side and ground.
      • Fig 2: Checking Circuit 57 (BK) For Open
      GF0008152Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : RECONNECT the clockspring. Go to  F3 .
    2. NO  : REPAIR the circuit. TEST the system for normal operation. REACTIVATE the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
  3. F3 CHECK THE CLOCKSPRING FOR VOLTAGE 
    • Disconnect the steering wheel switch harness from the clockspring.
    • Place the headlamp switch in the PARKING LAMPS ON position.
    • Rotate the instrument panel dimmer switch to the full illumination position.
    • Measure the voltage between the upper clockspring connector pin 1, component side and ground.
      • Fig 3: Checking Clockspring For Voltage
      GF0008153Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  F4.
    2. NO  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation. REACTIVATE the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
  4. F4 CHECK THE CLOCKSPRING FOR GROUND 
    • Place the headlamp switch in the OFF position.
    • Measure the resistance between the upper clockspring connector pin 2, component side and ground.
      • Fig 4: Checking Clockspring For Ground
      GF0008154Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F5.
    2. NO  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation. REACTIVATE the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
  5. F5 CHECK THE STEERING WHEEL CONTROL SWITCH HARNESS 
    • Inspect the steering wheel control switch harness for shorts, opens, or any 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 air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
    2. NO  : INSTALL a new steering wheel control switch harness. TEST the system for normal operation. REACTIVATE the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article.
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