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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1546 (Transfer Case - Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Pinpoint Tests >> Pinpoint Test K: Low to High (Clockwise)/High to Low (Counterclockwise) Relay Circuitry Functional Test >> Pinpoint Test K: Low To High (Clockwise)/High To Low (Counterclockwise) Relay Circuitry Functional Test

Pinpoint Test K: Low To High (Clockwise)/High To Low (Counterclockwise) Relay Circuitry Functional Test

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. K1 CHECK THE CLOCKWISE/COUNTERCLOCKWISE RELAY CIRCUITS FOR VOLTAGE 
    • Key in OFF position.
    • Disconnect: Clockwise Relay C1129.
    • Disconnect: Counterclockwise Relay C1173.
    • Measure the voltage between clockwise motor relay C1129 pins 85 and 87, circuit 704 (DG/LG), harness side and ground.
    • Measure the voltage between counterclockwise motor relay C1173 pins 85 and 87, circuit 704 (DG/LG), harness side and ground.
      Fig 1: Checking Clockwise/Counterclockwise Relay Circuits For Voltage
      G04650783Courtesy of FORD MOTOR CO.
    • Is the voltage 9 volts or greater? 

    Yes  : GO to K2.

    No  : INSPECT battery junction box (BJB) fuse 3 (30A) for an open. If OK, REPAIR circuit 704 (DG/LG) for an open. CLEAR the DTCs. REPEAT the self-test.

  2. K2 CHECK THE CLOCKWISE/COUNTERCLOCKWISE RELAY GROUND CIRCUITS 
    • Measure the resistance between clockwise motor relay C1129-87a, circuit 57a (BK), harness side and ground.
    • Measure the resistance between counterclockwise motor relay C1173-87a, circuit 57b (BK), harness side and ground.
      Fig 2: Checking Clockwise/Counterclockwise Relay Ground Circuits
      G04650784Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes  : GO to K3.

    No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  3. K3 CHECK CIRCUIT 777 (YE) AND CIRCUIT 778 (OG) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Clockwise Motor Relay C1129.
    • Disconnect: Counterclockwise Motor Relay C1173.
    • Key in ON position.
    • Measure the resistance between transfer case C350b-1, harness side and counterclockwise motor relay C1173-30, circuit 778 (OG), harness side.
    • Measure the resistance between transfer case C350b-2, harness side and clockwise motor relay C1129-30, circuit 777 (YE), harness side.
      Fig 3: Checking Circuit 777 (YE) And Circuit 778 (OG) For Open
      G04650785Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes  : GO to K4.

    No  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  4. K4 CHECK THE RELAY CONTROL CIRCUITS 781 (OG/LB) AND CIRCUIT 782 (BN/WH) FOR AN OPEN 
    • Disconnect: 4x4 Module (GEM) C281b.
    • Measure the resistance between 4WD control module (GEM) C281b-6, harness side and counterclockwise motor relay C1173-86, circuit 781 (OG/LB).
      Fig 4: Checking Relay Control Circuits 781 (OG/LB) And Circuit 782 (BN/WH) For Open (1 Of 2)
      G04650786Courtesy of FORD MOTOR CO.
    • Measure the resistance between 4WD control module (GEM) C281b-5, harness side and counterclockwise motor relay C1129-86, circuit 782 (BN/WH).
      Fig 5: Checking Relay Control Circuits 781 (OG/LB) And Circuit 782 (BN/WH) For Open (2 Of 2)
      G04650787Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 

    Yes  : CARRY OUT the ISO relay component test. INSTALL a new relay(s) as necessary.

    No  : REPAIR the circuit. CLEAR the DTCs. INSPECT and if necessary, clean the 4x4 module and 4x4 relay connectors. REPEAT the self-test.

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