Pinpoint Test O: The Hazard Lamps Are Inoperative/Always On

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

O1 CHECK THE RECORDED DTCs FROM THE SJB SELF-TEST
- Ignition OFF.
- Check the recorded DTCs from the SJB self-test.
- Is DTC B2071 present?
- Yes: GO to O2 .
- No: GO to O4.
O2 CHECK THE MULTIFUNCTION SWITCH FOR A SHORT TO GROUND
- Disconnect: Multifunction Switch C202.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: SJB Self-Test.
- Repeat the SJB self-test.
- Is DTC B2071 still present?
- Yes: GO to O3 .
- No: INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
O3 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: SJB C2280b.
- Measure the resistance between the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side and ground.
  
  Fig 1: Measuring Resistance Between Multifunction Switch C202-1, Circuit CLS32 (BN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes: GO to O7.
- No: REPAIR circuit CLS32 (BN/YE) for a short to ground. TEST the system for normal operation.
O4 CHECK FOR A VOLTAGE SIGNAL TO THE MULTIFUNCTION SWITCH
- Disconnect: Multifunction Switch C202.
- Measure the voltage between the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between Multifunction Switch C202-1, Circuit CLS32 (BN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to O6.
- No: GO to O5 .
O5 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR AN OPEN
- Disconnect: SJB C2280.
- Measure the resistance between the SJB C2280b-48, circuit CLS32 (BN/YE), harness side and the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side.
  
  Fig 3: Checking Hazard Lamp Request Input Circuit For An Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to O4.
- No: REPAIR circuit CLS32 (BN/YE) for an open. TEST the system for normal operation.
O6 CHECK FOR VOLTAGE TO THE MULTIFUNCTION SWITCH USING THE CONNECTOR GROUND
- Measure the voltage between the multifunction switch C202-1, circuit CLS32 (BN/YE), harness side and the multifunction switch C202-8, circuit GD114 (BK/BU), harness side.
  
  Fig 4: Checking Voltage To Multifunction Switch Using Connector Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
- No: REPAIR circuit GD114 (BK/BU) for an open. TEST the system for normal operation.
O7 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?
- Yes: INSTALL a new SJB . REFER to MULTIFUNCTION ELECTRONIC MODULES . 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.