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

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. 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.

N1 CHECK THE RECORDED DTCs FROM THE BCM SELF-TEST
- Check the recorded DTCs from the BCM self-test.
- Is DTC B1D35:11 present?
- Yes : GO to N2.
- No : GO to N5.
N2 ISOLATE THE HAZARD FLASHER LAMP SWITCH AS THE CAUSE OF DTC B1D35:11
- Ignition OFF.
- Disconnect: Hazard Flasher Lamp Switch.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: BCM Self-Test.
- Repeat the BCM self-test.
- Is DTC B1D35:11 still present?
- Yes : GO to N3.
- No : INSTALL a new hazard flasher lamp switch. TEST the system for normal operation.
N3 ISOLATE THE SCCM AS THE CAUSE OF DTC B1D35:11
- Ignition OFF.
- Disconnect: SCCM C2414A.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: BCM Self-Test.
- Repeat the BCM self-test.
- Is DTC B1D35:11 still present?
- Yes : GO to N4.
- No : GO to N7.
N4 CHECK THE HAZARD LAMP REQUEST INPUT CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: BCM C2280B.
- Measure the resistance between the SCCM C2414A-2, circuit CLS32 (BN/YE), harness side and ground.
  
  Fig 1: Measuring Resistance Between SCCM C2414A-2, Circuit CLS32 (BN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
- Yes : GO to N8.
- No : REPAIR circuit CLS32 (BN/YE) for a short to ground. TEST the system for normal operation.
N5 CHECK FOR A VOLTAGE SIGNAL TO THE SCCM
- Disconnect: SCCM C2414A.
- Ignition OFF.
- Measure the voltage between the SCCM C2414A-2, circuit CLS32 (BN/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between SCCM C2414A-2, Circuit CLS32 (BN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new hazard flasher lamp switch. TEST the system for normal operation.
  If the concern is still present, GO to N7.
- No : GO to N6.
N6 CHECK THE HAZARD FLASHER LAMP REQUEST INPUT CIRCUIT FOR AN OPEN
- Disconnect: BCM C2280B.
- Measure the resistance between the BCM C2280B-32, circuit CLS32 (BN/YE), harness side and the SCCM C2414A-2, circuit CLS32 (BN/YE), harness side.
  
  Fig 3: Measuring Resistance Between BCM C2280B-32, Circuit CLS32 (BN/YE) And SCCM C2414A-2, Circuit CLS32 (BN/YE), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to N8.
- No : REPAIR circuit CLS32 (BN/YE) for an open. TEST the system for normal operation.
N7 CHECK FOR CORRECT SCCM OPERATION
- Disconnect all the SCCM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the SCCM 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 SCCM. REFER to STEERING COLUMN SWITCHES . 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.
N8 CHECK FOR CORRECT BCM OPERATION
- Disconnect all the BCM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the BCM 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 BCM. 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.