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

WARNING: This page is about a different car, the 2009 Ford Pickup, 2009 Ford F550 Super Duty, 2009 Ford F450 Super Duty, and 2009 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. J1 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 C1129-87, circuit SBB26 (YE/RD), harness side and ground.
      • Fig 1: Checking Clockwise/Counterclockwise Relay Circuits For Voltage
      GF0049389Courtesy of FORD MOTOR CO.
    • Measure the voltage between counterclockwise motor relay C1173-87, circuit SBB48 (VT/RD), harness side and ground.
    • Is the voltage 9 volts or greater? 
    1. YES  : Go to  J2.
    2. NO  : INSPECT BJB fuse 26 (30A) for an open. If OK, REPAIR circuit SBB26 (YE/RD) for an open. CLEAR the DTCs. REPEAT the self-test.
  2. J2 CHECK THE CLOCKWISE/COUNTERCLOCKWISE RELAY GROUND CIRCUITS 
    • Measure the resistance between clockwise motor relay C1129-87a, circuit GD122 (BK), harness side and ground.
      • Fig 2: Checking Clockwise/Counterclockwise Relay Ground Circuits
      GF0049390Courtesy of FORD MOTOR CO.
    • Measure the resistance between counterclockwise motor relay C1173-87a, circuit GD122 (BK), harness side and ground.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  J3.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  3. J3 CHECK CIRCUIT CCF07 (BN/GN) AND CIRCUIT CCF08 (GY/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 CCF08 (GY/OG), harness side.
      • Fig 3: Checking Circuit CCF07 (BN/GN) & CCF08 (GY/OG) For An Open
      GF0049391Courtesy of FORD MOTOR CO.
    • Measure the resistance between transfer case C350b-2, harness side and clockwise motor relay C1129-30, circuit CCF07 (BN/GN), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  J4.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  4. J4 CHECK THE RELAY CONTROL CIRCUIT CCF27 (GY) AND CIRCUIT CCF28 (VT/GY) FOR AN OPEN 
    • Disconnect: 4X4 Control Module C281b
      • Fig 4: Checking Relay Control Circuit CCF27 (GY) & CCF28 (VT/GY) For An Open (1 Of 2)
      GF0049392Courtesy of FORD MOTOR CO.
    • Measure the resistance between the 4X4 control module C281b-6, harness side and counterclockwise motor relay C1173-86, circuit CCF27 (GY).
      • Fig 5: Checking Relay Control Circuit CCF27 (GY) & CCF28 (VT/GY) For An Open (2 Of 2)
      GF0049393Courtesy of FORD MOTOR CO.
    • Measure the resistance between 4X4 control module C281b-5, harness side and counterclockwise motor relay C1129-86, circuit CCF28 (VT/GY).
    • Are the resistances less than 5 ohms? 
    1. YES  : CARRY OUT the ISO Relay Component Test. Refer to COMPONENT TESTING. INSTALL a new relay(s) as necessary.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. INSPECT and if necessary, clean the 4X4 control module and 4X4 relay connectors. REPEAT the self-test.
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