Pinpoint Test Q: The Hazard Lamps Are Always On: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

Q1 CHECK THE HAZARD SWITCH
- Key in OFF position.
- Disconnect: Hazard Switch C2114.
- Do the hazard lamps continue to illuminate?
- Yes : GO to Q2.
- No : INSTALL a new hazard switch. CLEAR the DTCs. REPEAT the self-test.
Q2 CHECK CIRCUIT 385 (WH/RD) FOR SHORT TO GROUND
- Disconnect: SJB C2280d.
- Measure the resistance between the hazard switch C2114-1, circuit 385 (WH/RD) and ground.
  
  Fig 1: Measuring Resistance Between Hazard Switch C2114-1, Circuit 385 (WH/RD) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to Q3.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
Q3 CHECK THE HAZARD SWITCH OPERATION
- Connect: Hazard Switch C2114.
- While pressing and releasing the hazard switch, measure the resistance between the SJB C2280d-23, circuit 385 (WH/RD), harness side and ground.
  
  Fig 2: Measuring Resistance Between SJB C2280D-23, Circuit 385 (WH/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms with the hazard switch pressed and greater than 10,000 ohms with the hazard switch released?
- Yes : GO to Q4.
- No : INSTALL a new hazard switch. CLEAR the DTCs. REPEAT the self-test.
Q4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - 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. CLEAR the DTCs. REPEAT the self-test.