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Home >> Ford >> 2004 >> Excursion 6.8 S, 4WD >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake System - General Information -- Excursion & F250-F550 Super Duty >> Diagnosis And Testing >> Brake System >> Pinpoint Tests >> Pinpoint Test C: Adjustable Brake Pedal Does Not Move

Pinpoint Test C: Adjustable Brake Pedal Does Not Move

  1. C1 CHECK MOTOR SOUND 
    • Allow two minutes for the thermal overload to reset.
    • Operate the adjustable pedal control switch.
    • Can the adjustable pedal motor be heard to operate? 
    • Yes  : GO to C2.
    • No  :GO to  C5.
  2. C2 CHECK MOTOR INSTALLATION 
    • Check adjustable pedal motor for correct installation.
    • Is the motor installation OK? 
    • Yes  : GO to C3.
    • No  :CORRECT the motor installation. TEST the system for normal operation.
  3. C3 CHECK ADJUSTABLE ACCELERATOR PEDAL SYSTEM 
    • Disconnect the brake pedal-to-accelerator pedal cable.
      Fig 1: Disconnecting Brake Pedal-To-Accelerator Pedal Cable
      G04026022Courtesy of FORD MOTOR CO.
    • Operate the adjustable pedal control switch.
    • Does the adjustable brake pedal operate now? 
    • Yes  : REPAIR the adjustable accelerator pedal system. refer to ACCELERATION CONTROL . TEST the system for normal operation.
    • No  :GO to C4.
  4. C4 INSPECT FOR FOREIGN MATERIAL 
    • Inspect the adjustable brake pedal assembly for foreign material causing a binding condition.
    • Was any foreign material found? 
    • Yes  : REMOVE the foreign material. RETEST for normal operation.
    • No  :GO to C5.
  5. C5 CHECK CABLE 
    • Dismount the adjustable pedal motor.
      Fig 2: Dismounting Adjustable Pedal Motor
      G04026023Courtesy of FORD MOTOR CO.
    • Inspect the ends of the brake pedal motor cable for wear or damage.
      Fig 3: Inspecting Ends Of Brake Pedal Motor Cable For Wear Or Damage
      G04026024Courtesy of FORD MOTOR CO.
    • Are the cable ends OK? 
    • Yes  : GO to C6.
    • No  :INSTALL a new brake pedal motor cable. TEST the system for normal operation.
  6. C6 ISOLATE CONDITION 
    • Determine the position of the adjustable pedal.
    • Is the pedal stopped in a mid-range position? 
    • Yes  : GO to C7.
    • No  :If the pedal is in the full forward position, GO to  C12. If the pedal is in the full rearward position, GO to  C14.
  7. C7 CHECK POWER FEED TO ADJUSTABLE PEDAL SWITCH 
    • Key in ACCESSORY position.
    • Measure the voltage at C2089-2, circuit 1567 (RD/LB).
    • Is the voltage greater than 10 volts? 
    • Yes  : GO to C8.
    • No  :REPAIR the open in circuit 1567 (RD/LB). TEST the system for normal operation.
  8. C8 ISOLATE SWITCH - CONTINUITY TO POWER FEED 
    • Press the switch to the forward and rearward position.
    • Measure the resistance between switch terminal 2 and terminals 1 and 7.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to C9.
    • No  :INSTALL a new switch. TEST the system for normal operation.
  9. C9 CHECK GROUND CIRCUIT 
    • Measure the resistance between C2089-3 and C2089-6 and ground.
    • Is the resistance less than 5 ohms at both terminals? 
    • Yes  : GO to C10.
    • No  :REPAIR the open in circuit 57 (BK) beyond the splice.
  10. C10 CHECK PEDAL FORWARD POWER CIRCUIT 
    • Disconnect: Adjustable Pedal Motor C2003.
    • Measure the resistance between C2089-1 and C2003, circuit 1489 (LB/BK).
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to C11.
    • No  :REPAIR the open in circuit 1489 (LB/BK). TEST the system for normal operation.
  11. C11 CHECK PEDAL REARWARD POWER CIRCUIT 
    • Measure the resistance between C2089-7 and C2003, circuit 1490 (LB/OG).
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new adjustable pedal motor.
    • No  :REPAIR the open in circuit 1490 (LB/OG). TEST the system for normal operation.
  12. C12 ISOLATE SWITCH - SHORT TO POWER FEED 
    • Disconnect: Adjustable Pedal Switch C2089.
    • Measure the resistance between switch terminals 2 and 1.
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new switch. TEST the system for normal operation.
    • No  :GO to C13.
  13. C13 CHECK MOTOR FORWARD FEED CIRCUIT FOR SHORT TO BATTERY 
    • Measure the voltage between C2089-1, circuit 1489 (LB/BK) and ground.
    • Is the voltage greater than 10 volts? 
    • Yes  : REPAIR the short to battery in circuit 1489 (LB/BK). TEST the system for normal operation.
    • No  :GO to  C6.
  14. C14 ISOLATE SWITCH - SHORT TO POWER SOURCE 
    • Disconnect: Adjustable Pedal Switch C2089.
    • Measure the resistance between switch terminals 7 and 1.
    • Is the resistance less than 5 ohms? 
    • Yes  : INSTALL a new switch. TEST the system for normal operation.
    • No  :GO to C15.
  15. C15 CHECK MOTOR REARWARD FEED CIRCUIT FOR SHORT TO BATTERY 
    • Measure the voltage between C2089-7, circuit 1490 (LB/OG) and ground.
    • Is the voltage greater than 10 volts? 
    • Yes  : REPAIR the short to battery in circuit 1490 (LB/OG). TEST the system for normal operation.
    • No  :GO to  C6.
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