Pinpoint Test M: The Turn Signal Lamps Are Always On

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

M1 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202.
- Key in ON position.
- Do the turn lamps continue to flash on and off?
Yes : GO to M2.

No : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . CLEAR the DTCs. REPEAT the self-test.
M2 CHECK CIRCUIT CLS39 (VT/WH) (LH TURN SIGNAL) OR CIRCUIT CLS41 (GY/YE) (RH TURN SIGNAL) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: SJB C280d.
- Measure the resistance between the multifunction switch C202-2 (LH turn lamps), circuit CLS39 (VT/WH), harness side and ground; or between the multifunction switch C202-3 (RH turn lamps), circuit CLS41 (GY/YE), harness side and ground.
  
  Fig 1: Checking Circuit CLS39 (VT/WH) (LH Turn Signal) Or Circuit CLS41 (GY/YE) (RH Turn Signal) For Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
Yes : GO to M3.

No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
M3 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 CONTROL 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 any DTCs. REPEAT the self-test.