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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 928 (Exterior Lighting System) >> Diagnostic Tests >> Headlamps >> Pinpoint Tests >> Pinpoint Test A: Both Headlamps Are Inoperative >> Pinpoint Test A: Both Headlamps Are Inoperative

Pinpoint Test A: Both Headlamps Are Inoperative

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. 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.
  1. A1 CHECK FOR VOLTAGE TO THE SJB 
    • Key in OFF position.
    • Disconnect: SJB C2280b
    • Measure the voltage between the SJB, harness side and ground as follows:
      SJB Connector-Pin Circuit
      C2280b-2 1695 (YE/WH)
      C2280b-3 54 (LG/YE)
      C2280b-29 1682 (RD/LB)
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  A2.
    2. NO  : VERIFY the BJB fuse 2 (25A) (Escape, Mariner), fuse 3 (25A) (Escape, Mariner), fuse 21 (40A) (Escape, Mariner), fuse 12 (25A) (Hybrid), fuse 13 (25A) (Hybrid), or fuse 23 (40A) (Hybrid) is OK. If OK, REPAIR the circuit(s) in question. TEST the system for normal operation.
  2. A2 CHECK CIRCUIT 570 (BK/WH) FOR AN OPEN 
    • Disconnect: Multifunction Switch C2080
      • Fig 1: Checking Circuit For Open
      GF0025953Courtesy of FORD MOTOR CO.
    • Measure the resistance between the multifunction switch C2080-10, circuit 570 (BK/WH), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. A3 CHECK THE MULTIFUNCTION SWITCH 
    • Carry out the multifunction switch component test. Refer to COMPONENT TESTING article.
    • Is the multifunction switch OK? 
    1. YES  : Go to  A4.
    2. NO  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES article. TEST the system for normal operation.
  4. A4 CHECK CIRCUIT 1033 (RD/YE) FOR AN OPEN 
    • Disconnect: SJB C2280e
      • Fig 2: Checking Circuit For Open
      GF0025954Courtesy of FORD MOTOR CO.
    • Measure the resistance between the multifunction switch C2080-13, circuit 1033 (RD/YE), harness side and the SJB C2280e-1, circuit 1033 (RD/YE), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  A5.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  5. A5 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 article. 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.
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