Taurus Car Club of America : Ford Taurus Forum banner

1 - 3 of 3 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter #1
Hello! I would like to replace my turn signals on my 2010 Taurus Limited with LEDs. I had found referenced online on the 'superbrightleds' site as well as RockAuto (Turn Signal Relay) that I could just use an EP27 LED electronic relay. SBL listed this as "Stock #5C3Z 13350-AA, 5L5Z 13350-AA", and showed it as an option/alternative to using a resistor. With that in mind, I ordered bulbs and a relay.

However... I have been trying to locate this relay and cannot find it! Am I wrong in looking at the fuse boards? I found fuse/relay #48 on the interior fuse panel listed as "Delayed accessory relay". However, I found other threads and references about this having something to do with the radio and other accessories. So I don't want to pull and replace it if it's the wrong thing?

I also would prefer not to have to try and splice in resistors, if possible... in fact, if the relay won't work and that's required to prevent hyperflash, I'll likely stick with halogen bulbs.

Any advice is appreciated! Also, apologies if this has been worked out before. I searched but could not find anything specific to the 2010.

Thanks!
Mike
 

·
Registered
Joined
·
20 Posts
I have a 2011 Limited and I'm sure yours is wired the same.

There is no flasher relay. Each turn signal bulb is individually powered by its own circuit from the SJB (Smart Junction Box). The output uses an FET (Field Effect Transistor) to measure the load on the circuit. I have avoided using LED turn signal bulbs in fear of damaging the SJB. I can recommend some absolutely blinding LED backup lights. They are not direct fit but they can be installed with minor modification.

https://www.amazon.com/Lumens-Canbus-Backup-Reverse-Extremely/dp/B0797K6GX1


Here is a description from the factory service manual:

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 clears 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.
 

Attachments

·
Registered
Joined
·
2 Posts
Discussion Starter #3
Wow...thank you VERY MUCH for such a thorough response! I’m very grateful! I also appreciate the helpful info from the service manual and the wiring guide.

I think I have essentially — almost — settled on saying “forget it” to the LED turn signals. I also do not want to damage the SJB and am not a fan of bite splices. I’m also nervous about resistors that get super hot... just the thought of melted wires or a fire in my trunk is enough to steer me away. It’s not THAT important. Lol

i have actually picked up some LED bulbs for the tail lights, backup lights, and front side markers that I may still try. However, I do not know if they are “Canbus error free” like those that you linked. I figured I could try them and see what happens, and return them if they don’t work out.
 
1 - 3 of 3 Posts
Top