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Headlamps Inoperative (Both)

PINPOINT TEST 1 - HEADLAMPS INOPERATIVE (BOTH)

PINPOINT TEST 1 HEADLAMPS ARE INOPERATIVE (BOTH)
STEP INSPECTION ACTION
1 CHECK THE FLASH-TO-PASS FEATURE
  • Key ON.
  • Check the operation of the flash-to-pass feature.
  • Does the flash-to-pass feature operate correctly? 
 Yes Go to step 2.
No Go to step 6.
2 CHECK THE VOLTAGE TO THE HEADLAMP SWITCH
  • Key OFF.
  • Disconnect: Main Light Switch 0918-103.
  • Measure the voltage between the main light switch 0918-103 pin 6, circuit R/Y, harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Go to step 4.
No Go to step 3.
3 CHECK THE VOLTAGE FROM THE SMART JUNCTION BOX (SJB)
  • Disconnect: SJB J-2280b.
  • Measure the voltage between the SJB J-2280b pin 4, circuit R/Y, component side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Repair the circuit. Test the system for normal operation.
No Go to step 7.
4 CHECK CIRCUIT V/LB FOR AN OPEN
  • Disconnect: Multifunction Switch 0918-105.
  • Measure the resistance between the main light switch 0918-103 pin 2, circuit V/LB, harness side and the multifunction switch 0918-105 pin 8, circuit V/LB, harness side.
  • Is the resistance less than 5 ohms? 
 Yes RECONNECT the headlamp switch. Go to step 5.
No Repair the circuit. Test the system for normal operation.
5 CHECK THE VOLTAGE TO THE MULTIFUNCTION SWITCH
  • Place the headlamp switch in the headlamps ON position.
  • Measure the voltage between the multifunction switch 0918-105 pin 8, circuit V/LB, harness side and ground.
  • Is the voltage greater than 10 volts? 
 Yes Install a new multifunction switch. See MULTI-FUNCTION SWITCH REMOVAL/INSTALLATION . Test the system for normal operation.
No Install a new headlamp switch. See MAIN LIGHT SWITCH REMOVAL/INSTALLATION . Test the system for normal operation.
6 CHECK THE MULTIFUNCTION SWITCH
  • Carry out the multifunction switch component test for the headlamps.
  • Is the multifunction switch OK? 
 Yes Turn the headlamp switch to off. Go to step 7.
No Install a new multifunction switch. See MULTI-FUNCTION SWITCH REMOVAL/INSTALLATION . Test the system for normal operation.
7 CHECK FOR CORRECT SJB OPERATION
  • Key OFF.
  • Disconnect all SJB connectors.
  • Check for:
    • corrosion
    • pushed-out pins
  • Connect all SJB connectors and make sure they seat correctly.
  • Operate the system and verify the concern is still present.
  • Is the concern still present? 
 Yes Install a new SJB. Test the system for normal operation.
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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