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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1208 (Exterior Lighting System) >> Diagnostic Tests >> Reversing Lamps >> Pinpoint Tests >> Pinpoint Test U: An Individual Reversing Lamp Is Inoperative >> Pinpoint Test U: An Individual Reversing Lamp Is Inoperative

Pinpoint Test U: An Individual Reversing Lamp Is Inoperative

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Make sure the bulb is good before continuing diagnostics.
  1. U1 CHECK CIRCUIT 1205 (BK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Inoperative Reversing Lamp
      • Fig 1: Checking Circuit 1205 (BK) For Open
      GF0001383Courtesy of FORD MOTOR CO.
    • Measure the resistance between the LH reversing lamp C451-1, circuit 1205 (BK), harness side and ground; or between the RH reversing lamp C461-1, circuit 1205 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  U2.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  2. U2 CHECK CIRCUIT 1362 (DG/OG) OR CIRCUIT 1367 (WH/YE) FOR A SHORT TO GROUND 
    • Disconnect: SJB C2280d
      • Fig 2: Checking Circuit 1362 (DG/OG) Or Circuit 1367 (WH/YE) For Short To Ground
      GF0016145Courtesy of FORD MOTOR CO.
    • Measure the resistance between the LH reversing lamp C451-2, circuit 1367 (WH/YE), harness side and ground; or between the RH reversing lamp C461-2, circuit 1367 (WH/YE), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  U3.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  3. U3 CHECK CIRCUIT 1362 (DG/OG) OR CIRCUIT 1367 (WH/YE) FOR AN OPEN 
      Fig 3: Checking Circuit 1362 (DG/OG) Or Circuit 1367 (WH/YE) For Open
      GF0016146Courtesy of FORD MOTOR CO.
    • Measure the resistance between the LH reversing lamp C451-2, circuit 1367 (WH/YE), harness side and the SJB C2280d-26, circuit 1362 (DG/OG), harness side; or between the RH reversing lamp C461-2, circuit 1367 (WH/YE), harness side and the SJB C2280d-13, circuit 1367 (WH/YE), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  U4.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
  4. U4 CHECK FOR CORRECT SJB OPERATION 
    • Disconnect all the SJB connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the SJB connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.
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