Pinpoint Test M: The Turn Signal 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.
- M1 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202a.
- Key in ON position.
- Do the turn signals 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 1393 (LB/RD) OR CIRCUIT 1392 (LG/OG) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: SJB C2280d.
- Measure the resistance between the multifunction switch C202a-6 (LH turn signal), circuit 1393 (LB/RD), harness side and ground; or between the multifunction switch C202a-7 (RH turn signal), circuit 1392 (LG/OG), harness side and ground.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to M3.
- No : REPAIR the circuit in question. 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 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.