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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 978 (Exterior Lighting System (F250-F550)) >> Diagnostic Tests >> Turn Signal and Hazard Lamps >> Pinpoint Tests >> Pinpoint Test M: The Hazard Lamps Are Inoperative >> Pinpoint Test M: The Hazard Lamps Are Inoperative

Pinpoint Test M: The Hazard Lamps Are Inoperative

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. M1 CHECK THE VOLTAGE TO THE ELECTRONIC FLASHER 
    • Key in OFF position.
    • Disconnect: Electronic Flasher C2047
      • Fig 1: Checking Circuit For Voltage
      GF0008312Courtesy of FORD MOTOR CO.
    • Measure the voltage between the electronic flasher C2047-3, circuit 10 (LG/RD), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  M3.
    2. NO  : VERIFY the CJB fuse 18 (20A) is OK. If OK, go to  M2 .
  2. M2 CHECK THE CJB 
    • Disconnect: CJB C270b
      • Fig 2: Checking Circuit For Voltage
      GF0008313Courtesy of FORD MOTOR CO.
    • Measure the voltage between the CJB C270b pin 2, circuit 10 (LG/RD), component side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR circuit 10 (LG/RD). TEST the system for normal operation.
    2. NO  : INSTALL a new CJB. TEST the system for normal operation.
  3. M3 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
      Fig 3: Checking Circuit For Open
      GF0008309Courtesy of FORD MOTOR CO.
    • Measure the resistance between the electronic flasher C2047-5, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  M4.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  4. M4 CHECK CIRCUIT 385 (WH/RD) FOR AN OPEN OR A SHORT TO GROUND 
    • Disconnect: Multifunction Switch C202a
      • Fig 4: Checking Circuit For Open Or Short To Ground
      GF0008314Courtesy of FORD MOTOR CO.
    • Measure the resistance between the multifunction switch C202a-3, circuit 385 (WH/RD), harness side and the electronic flasher C2047-4, circuit 385 (WH/RD), harness side; and between the multifunction switch C202a-3, circuit 385 (WH/RD), harness side and ground.
    • Is the resistance less than 5 ohms between the multifunction switch and the electronic flasher, and greater than 10,000 ohms between the multifunction switch and ground? 
    1. YES  : Go to  M5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. M5 CHECK CIRCUIT 44 (LB) FOR A SHORT TO GROUND 
      Fig 5: Checking Circuit For Short To Ground
      GF0008315Courtesy of FORD MOTOR CO.
    • Measure the resistance between the multifunction switch C202a-2, circuit 44 (LB), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  M6.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  6. M6 CHECK THE MULTIFUNCTION SWITCH  
    • Carry out the multifunction switch component test. Refer to COMPONENT TESTING article.
    • Is the multifunction switch OK? 
    1. YES  : INSTALL a new electronic flasher. TEST the system for normal operation.
    2. NO  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
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