Ford Edge Turn Signal Lights

[fernando barber]

I want to find the location of directional signal flasher on my ford edge 2013 , to solve signal light problems explained below, all fuses found ok. the problem below occured after polarity change during alternate starter due battery leak.

 

 

Turn signal lights not working properly:LH front is ok, RH front is stucked ON and both rear are OFF with Hazard switch ON.

 

 

Regards

 

Fernando Barber

[enigma-2]

On my 09 MKX,there is no flasher, it's a circuit in the Smart Junction Box. I doubt it was changed on later models.

[akirby]

That's still the case.

[fernando barber]

Do I have to replace this box to fix the problem?

[akirby]

Hard to say without doing some basic troubleshooting. Try disconnecting the battery for a few minutes first and see if that resets it. You may need a dealer tool to replace the SJB if that's the problem.

[fernando barber]

Where is SJB located?

[WWWPerfA_ZN0W]

BCM under the driver side dash

 

Principles of Operation

The Body Control Module (BCM) controls various systems by monitoring inputs from switches, sensors and messages sent from other modules. The BCM activates outputs based on the inputs received. For example, the Front Lighting Control Module (FLM) monitors the headlamp switch and transmits the headlamp switch position to the BCM over the network. Based on this input, the BCM may provide voltage to the exterior lamps.

Field-Effect Transistor (FET) Protection

A Field-Effect Transistor (FET) is a type of transistor that, when used with module software, monitors and controls current flow on module outputs. The FET protection strategy prevents module damage in the event of excessive current flow.

The BCM utilizes an FET protective circuit strategy for many of its outputs (for example, a headlamp output circuit). Output loads (current level) are monitored for excessive current (typically short circuits) and are shut down (turns off the voltage or ground provided by the module) when a fault event is detected. A short circuit DTC is stored at the fault event and a cumulative counter is started.

When the demand for the output is no longer present, the module resets the FET protection to allow the circuit to function. The next time the driver requests a circuit to activate that has been shut down by a previous short ( FET protection) and the circuit is still shorted, the FET protection shuts off the circuit again and the cumulative counter advances.

When the excessive circuit load occurs often enough, the module shuts down the output until a repair procedure is carried out. Each FET protected circuit has 3 predefined levels of short circuit tolerance based on the harmful effect of each circuit fault on the FET and the ability of the FET to withstand it. A module lifetime level of fault events is established based upon the durability of the FET . If the total tolerance level is determined to be 600 fault events, the 3 predefined levels would be 200, 400 and 600 fault events.

When each tolerance level is reached, the short circuit DTC that was stored on the first failure cannot be cleared by the clear the continuous DTCs command. The module does not allow this code to be cleared or the circuit restored to normal operation until a successful self-test proves that the fault has been repaired. After the self-test has successfully completed (no on-demand DTCs present), DTC U1000:00 and the associated DTC (the DTC related to the shorted circuit) automatically clears and the circuit function returns.

When each level is reached, the DTC associated with the short circuit sets along with DTC U1000:00. These DTCs are cleared using the module on-demand self-test, then the Clear DTC operation on the scan tool (if the on-demand test shows the fault corrected). The module never resets the fault event counter to zero and continues to advance the fault event counter as short circuit fault events occur.

If the number of short circuit fault events reach the third level, then DTCs U1000:00 and U3000:49 set along with the associated short circuit DTC. DTC U3000:49 cannot be cleared and the module must be replaced after the repair.

Gateway Function

The BCM acts as a gateway module by receiving information in one format and transmitting it to other modules using another format. For example, the BCM receives the vehicle speed data from the PCM over the High Speed Controller Area Network (HS-CAN), converts the data into a Medium Speed Controller Area Network (MS-CAN) message and sends (gateways) the message to other network modules such as the HVAC module and the Audio Front Control Module (ACM). This enables network communication between modules that do not communicate using the same network ( HS-CAN or MS-CAN ).

[enigma-2]

I agree with akirby, try disconnecting the battery for twenty minutes. See if the SJB resets.

[fernando barber]

I disconnected the battery for 03 hours and still the same.