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Pinpoint Test O: The Defrost System Is Inoperative - Heated Wiper Park

WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
  1. O1 CHECK THE POWER TO THE HEATED WIPER PARK RELAY 
    • Key in OFF position.
    • Disconnect: Heated Wiper Park Relay C1014.
    • Measure the voltage between the heated wiper park relay C1014-86, circuit 30-HB8A (RD/OG), harness side and ground; and between the heated wiper park relay C1014-30, circuit 30-HB8 (RD/OG), harness side and ground.
      Fig 1: Measuring Voltage Between Heated Wiper Park Relay C1014-86, Circuit 30-HB8A (RD/OG)
      G03203497Courtesy of FORD MOTOR CO.
    • Are both voltages greater than 10 volts? 
    1. Yes  : GO to O2.
    2. No  : GO to  O6.
  2. O2 CHECK THE SWITCHED GROUND FROM THE DATC MODULE 
    • Key in ON position.
    • Turn on the climate control.
    • NOTE: Heated wiper park will remain on for 90 seconds.
    • Press the auto and defrost buttons simultaneously to turn on the heated wiper park.
    • Measure the voltage between the heated wiper park relay C1014-85, circuit 91S -HB7 (BK/BU), harness side and the heated wiper park relay C1014-86, circuit 30-HB8A (RD/OG), harness side.
      Fig 2: Measuring Voltage Between Heated Wiper Park Relay C1014-85, Circuit 91S -HB7 (BK/BU)
      G03203498Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to O3.
    2. No  : GO to  O7.
  3. O3 CHECK THE HEATED WIPER PARK RELAY OUTPUT 
    • Key in OFF position.
    • Connect: Heated Wiper Park Relay C1014.
    • Disconnect: Heated Wiper Park C247.
    • Key in ON position.
    • Turn on the climate control.
    • NOTE: Heated wiper park will remain on for 90 seconds.
    • Press the auto and defrost buttons simultaneously to turn on the heated wiper park.
    • Measure the voltage between the heated wiper park C247-1, circuit 30S-HB42 (RD/YE), harness side and ground.
      Fig 3: Measuring Voltage Between Heated Wiper Park C247-1, Circuit 30S-HB42 (RD/YE)
      G03203499Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : GO to  O5.
    2. No  : GO to O4.
  4. O4 CHECK CIRCUIT 30S-HB42 (RD/YE) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Heated Wiper Park Relay C1014.
    • Measure the resistance between the heated wiper park relay C1014-87, circuit 30S-HB42 (RD/YE), harness side and the heated wiper park C247-1, circuit 30S-HB42 (RD/YE), harness side.
      Fig 4: Measuring Resistance Between Heated Wiper Park Relay C1014-87, Circuit 30S-Hb42 (Rd/Ye), Harness Side
      G03203500Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : INSTALL a new heated wiper park relay. TEST the system for normal operation.
    2. No  : REPAIR the circuit. TEST the system for normal operation.
  5. O5 CHECK THE HEATED WIPER PARK GROUND 
    • Key in OFF position.
    • Disconnect: Heated Wiper Park C246.
    • Key in ON position.
    • Turn on the climate control.
    • NOTE: Heated wiper park will remain on for 90 seconds.
    • Press the auto and defrost buttons simultaneously to turn on the heated wiper park.
    • Measure the voltage between the heated wiper park C247-1, circuit 30S-HB42 (RD/YE), harness side the heated wiper park C246-1, circuit 31-HB42 (BK/YE), harness side.
      Fig 5: Measuring Voltage Between Heated Wiper Park C247-1, Circuit 30S-HB42 (RD/YE), Harness Side
      G03203501Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : INSTALL a new windshield. REFER to WINDSHIELD GLASS . TEST the system for normal operation.
    2. No  : REPAIR circuit 31-HB42 (BK/YE). TEST the system for normal operation.
  6. O6 CHECK THE UNDERHOOD AJB FOR POWER 
    • Disconnect: Underhood AJB Fuse 13 (30A).
    • Measure the voltage between the underhood AJB fuse 13 (30A) input cavity, and ground.
      Fig 6: Measuring Voltage Between Underhood AJB Fuse 13 (30A) Input Cavity, And Ground
      G03203502Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. Yes  : REPAIR circuit 30-HB8 (RD/OG). TEST the system for normal operation.
    2. No  : REPAIR the underhood AJB input circuit. TEST the system for normal operation.
  7. O7 CHECK CIRCUIT 91S-HB7 (BN/RD) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: DATC Module C228b.
    • Measure the resistance between the heated wiper park relay C1014-85, circuit 91S-HB7 (BN/RD), harness side and the DATC module C228b-20, circuit 91S-HB7 (BN/RD), harness side.
      Fig 7: Measuring Resistance Between Heated Wiper Park Relay C1014-85, Circuit 91S-HB7 (BN/RD)
      G03203503Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. Yes  : INSTALL a new DATC module. REFER to MODULE COMMUNICATIONS NETWORK - LS for the removal and installation procedure. TEST the system for normal operation.
    2. No  : REPAIR the circuit. TEST the system for normal operation.
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