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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 >> Headlamps >> Pinpoint Tests >> Pinpoint Test B: Both High Beams Are Inoperative >> Pinpoint Test B: Both High Beams Are Inoperative

Pinpoint Test B: Both High Beams Are 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.
  1. B1 CHECK THE LOW BEAMS 
    • Key in OFF position.
    • Place the headlamp switch in the HEADLAMPS ON position.
    • Do the low beams illuminate? 
    1. YES  : Go to  B2.
    2. NO  : Go to Pinpoint Test A .
  2. B2 USE THE RECORDED DTCs FROM THE SJB SELF-TEST 
    • Place the headlamp switch in the OFF position.
    • Retrieve the recorded results from the SJB self-test.
    • Was DTC B2598 or B2586 present? 
    1. YES  : For DTC B2598, go to  B3.

      For DTC B2586, go to  B9.

    2. NO  : Go to  B11.
  3. B3 CHECK THE HIGH BEAM RELAY (DTC B2598) 
    • Disconnect: High Beam Relay
    • Substitute a known good relay and recheck the operation on the high beams.
    • Do the high beams operate correctly? 
    1. YES  : REMOVE the known good relay. INSTALL a new high beam relay. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REMOVE the known good relay. Go to  B4.
  4. B4 CHECK THE HIGH BEAM RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Disconnect: SJB C2280c
    • Key in ON position.
      • Fig 1: Checking Circuit 1708 (LG/BK) For Short To Voltage
      GF0016096Courtesy of FORD MOTOR CO.
    • Measure the voltage between the high beam relay pin 86, circuit 1708 (LG/BK), BEC face side and ground.
    • Is any voltage present? 
    1. YES  : Go to  B5.
    2. NO  : Go to  B6.
  5. B5 CHECK CIRCUIT 1708 (LG/BK) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: BEC C1035a
    • Key in ON position.
      • Fig 2: Checking Circuit 1708 (LG/BK) For Short To Voltage
      GF0016096Courtesy of FORD MOTOR CO.
    • Measure the voltage between the high beam relay pin 86, circuit 1708 (LG/BK), BEC face side and ground.
    • Is any voltage present? 
    1. YES  : INSTALL a new BEC. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  6. B6 CHECK THE VOLTAGE FEED TO THE HIGH BEAM RELAY COIL 
    • Key in OFF position.
      • Fig 3: Checking Voltage Feed To High Beam Relay Coil
      GF0016097Courtesy of FORD MOTOR CO.
    • Measure the voltage between the high beam relay pin 85, BEC face side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B7.
    2. NO  : VERIFY the BEC fuse 50 (15A) is OK. If OK, INSTALL a new BEC. CLEAR the DTCs. REPEAT the self-test.
  7. B7 CHECK THE HIGH BEAM RELAY CONTROL CIRCUIT FOR AN OPEN 
      Fig 4: Checking High Beam Relay Control Circuit For Open
      GF0016098Courtesy of FORD MOTOR CO.
    • Measure the resistance between the high beam relay pin 86, circuit 1708 (LG/BK), BEC face side and the SJB C2280c-1, circuit 1708 (LG/BK), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  B15.
    2. NO  : Go to  B8.
  8. B8 CHECK CIRCUIT 1708 (LG/BK) FOR AN OPEN 
    • Disconnect: BEC C1035a
      • Fig 5: Measuring Resistance Between BEC C1035A-B11 And SJB C2280C-1
      GF0016099Courtesy of FORD MOTOR CO.
    • Measure the resistance between the BEC C1035a-B11, circuit 1708 (LG/BK), harness side and the SJB C2280c-1, circuit 1708 (LG/BK), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new BEC. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  9. B9 CHECK THE MULTIFUNCTION SWITCH 
    • Disconnect: Multifunction Switch C202
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: SJB Self-Test
    • Repeat the SJB on-demand self-test.
    • Is DTC B2586 retrieved again? 
    1. YES  : Go to  B10.
    2. NO  : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
  10. B10 CHECK CIRCUITS 1394 (WH/RD) FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Place the headlamp switch in the OFF position.
    • Disconnect: SJB C2280b
      • Fig 6: Checking Circuits 1394 (WH/RD) For A Short To Ground
      GF0046526Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SJB C2280b-45, circuit 1394 (WH/RD), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  B15.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  11. B11 CHECK THE HIGH BEAM SWITCH INPUT 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: SJB DataLogger
    • Monitor the SJB multifunction switch status PID (HBEAMSW) while placing the multifunction switch in the HIGH BEAM position.
    • Does the PID indicate HIGH BEAM position is active? 
    1. YES  : Go to  B12.
    2. NO  : Go to  B13.
  12. B12 CHECK THE HIGH BEAM RELAY (NO DTCs) 
    • Key in OFF position.
    • Place the headlamp switch in the OFF position.
    • Disconnect: High Beam Relay
    • Substitute a known good relay and recheck the operation on the high beams.
    • Do the high beams operate correctly? 
    1. YES  : REMOVE the known good relay. INSTALL a new high beam relay. TEST the system for normal operation.
    2. NO  : REMOVE the known good relay. INSTALL a new BEC. TEST the system for normal operation.
  13. B13 CHECK THE MULTIFUNCTION SWITCH 
    • Key in OFF position.
    • Disconnect: Multifunction Switch C202
    • Key in ON position.
      • Fig 7: Connecting Fused (5A) Jumper Wire Between Multifunction Switch C202-8, Circuit 1394 (WH/RD)
      GF0016100Courtesy of FORD MOTOR CO.
    • Connect a fused (5A) jumper wire between the multifunction switch C202-8, circuit 1394 (WH/RD), harness side and the multifunction switch C202-10, circuit 1396 (VT/WH), harness side.
    • Enter the following diagnostic mode on the diagnostic tool: SJB DataLogger
    • Monitor the SJB multifunction switch status PID (HBEAMSW).
    • Does the PID indicate HIGH BEAM position is active? 
    1. YES  : REMOVE the jumper wire. INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
    2. NO  : REMOVE the jumper wire. Go to  B14.
  14. B14 CHECK CIRCUITS 1394 (WH/RD) AND 1396 (VT/WH) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: SJB C2280b
      • Fig 8: Measuring Resistance Between SJB C2280B-45, Circuit 1394 (WH/RD), Harness Side & Multifunction Switch C202-8
      GF0046527Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SJB C2280b-45, circuit 1394 (WH/RD), harness side and the multifunction switch C202-8, circuit 1394 (WH/RD), harness side.
      • Fig 9: Measuring Resistance Between SJB C2280B-4, Circuit 1396 (VT/WH), Harness Side & Multifunction Switch C202-10
      GF0046528Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SJB C2280b-4, circuit 1396 (VT/WH) and the multifunction switch C202-10, circuit 1396 (VT/WH).
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B15.
    2. NO  : REPAIR the circuit in question. TEST the system for normal operation.
  15. B15 CHECK THE SJB CONFIGURATION 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: SJB DataLogger
      • NOTE: Vehicles equipped with halogen headlamps should display Non HID. Vehicles with HID headlamps should display HID Active Mode.
    • Monitor the SJB headlamp configuration PID (HID Status).
    • Is the configuration correct for the vehicle build? 
    1. YES  : Go to  B16.
    2. NO  : CONFIGURE the module using as-built data. TEST the system for normal operation.
  16. B16 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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