Turn Signal Flasher Relay Location

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Kjhawkeye1

Full Access Members
Joined
Aug 2, 2017
Posts
186
Reaction score
83
Location
River Falls, WI
As the title says, I'm looking for the relay for the turn signals on a 2011 Expedition EL. Changing over to LEDs and have the new relay but cannot locate the relay location on the vehicle.

Anyone know where it is?
 

Bedrck47

Full Access Members
Joined
Jul 4, 2014
Posts
5,641
Reaction score
652
Location
Elizebethtown, PA
The flasher unit is part of the fuse box

Read the Following

Principles of Operation

NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).

The SJB monitors the multifunction switch position by sending multiple voltage reference signals to the multifunction switch. When the multifunction switch is in the LH or RH TURN position, or the hazard lamp switch is pressed, that input signal is routed to ground.

When the SJB receives a request for a turn signal or hazard lamps, the SJB supplies voltage to the appropriate turn lamps.

The timed on/off cycle is determined by the SJB and is set to flash approximately 80 times per minute if both the front and rear turn lamps operate correctly. If an individual turn signal lamp is inoperative, the SJB flashes the remaining turn lamp approximately 160 times per minute.

Field-Effect Transistor (FET) Protection

Field-Effect Transistor (FET) is a type of transistor that when used with module software can be used to monitor and control current flow on module outputs. The FET protection strategy is used to prevent module damage in the event of excessive current flow.

The SJB utilizes a 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 continuous 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 circuit 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 remains 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 continuous DTC that was stored on the first failure cannot be cleared by a command to clear the continuous DTCs. 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 B106E and the associated continuous DTC (the DTC related to the shorted circuit) automatically clear and the circuit function returns.

When the first or second level is reached, the continuous DTC (associated with the short circuit) sets along with DTC B106E. These DTCs can be 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 B106F and B1342 set along with the associated continuous DTC. This DTC cannot be cleared and the module must be replaced.

The SJB FET protected output circuits for the turn lamp system are the LH front turn lamp and the RH front turn lamp output circuits. The rear turn lamps utilize the stoplamp circuitry and are also protected. For information regarding the rear lamp FET protection, refer to Stoplamps in this section.
 
OP
OP
Kjhawkeye1

Kjhawkeye1

Full Access Members
Joined
Aug 2, 2017
Posts
186
Reaction score
83
Location
River Falls, WI
The high current fuse box in the engine compartment lists a turn relay in 37 and 38. So I need a relay for each side? Anyone else running LED turn signals or brake lights? How do you keep from hyper flashing?
 

Bedrck47

Full Access Members
Joined
Jul 4, 2014
Posts
5,641
Reaction score
652
Location
Elizebethtown, PA
Those two relays that you refer to in slots 37 and 38 are used to power your trailer connector The are operated from the solid state relay in the passenger compartment fuse box. They do not have anything to do with the turn signal lamps on the Expedition

You only need those relays if you are going to tow a trailer
 
Last edited:
OP
OP
Kjhawkeye1

Kjhawkeye1

Full Access Members
Joined
Aug 2, 2017
Posts
186
Reaction score
83
Location
River Falls, WI
So I'm picking up that there isn't really a flasher relay and just getting resistors to wire in is the only route to go. That sound right?
 

gixer2000

Retrofit or Bust
Joined
Oct 13, 2015
Posts
1,467
Reaction score
642
Location
Massachusetts
There is no relay that can be replaced so you either need 2 load resisters (if you do front and rear led) each side or pick up Forscan to reprogram the bulb out warning
 
Top