Heated seats stopped working

[Sbouvia]

So it looks like I could post the pics now can you confirm they are in post? JPEG now shows up as an allowed picture

 

[ZSHO]

So it looks like I could post the pics now can you confirm they are in post? JPEG now shows up as an allowed picture

Affirmative. Thanks for posting. Z :thumb:

 

[SHOdded]

Nasty burns right there.

 

[mjhpadi]

Just a couple of quick info thoughts.  First be careful with Rock Auto, I ordered new struts and shocks for my Mustang and they sent the wrong parts for the install of the struts.  And since more than 30 days passed from the time I got the order until I did the install, they refused to replace with the correct parts. And it was Rock Auto's mistake because the shocks and struts were the correct ones.  I won't purchase from them.
Second, several years ago I had a problem with my seats, both the passenger and driver seat would inflate on their own, random and they always would inflate fully.  Ford is aware of the problem and did fix both of them under warranty so this appears to be another problem that is related to the heated/cooled/massage seats....

 

[Mustang5L5]

It's been a while since I've done the repair, and everything is going quite well.  I finished the winter off with those heated seats burning my butt off every morning.  Felt great!  Now that warm weather is here, the cooled seats have been being used daily.


One hiccup though with the heated seats.  If i engage the heated seat function too frequently (like when running errands and constantly turning the car on and off and activating the heated seats) i get an overtemperature fault read by ForScan.

The FSM has this to say

NOTE: The presence of overtemperature faults (DTCs B2729, B2730, B272A and B272B) can be induced by
incorrect operation of the climate controlled seat system after an initial heat setting has been attained. If a heat
setting is repeatedly turned OFF and ON in an attempt to increase the seat temperature or repeatedly toggled
between heat and cool modes, an overtemperature condition can result and the DTCs will be set.
If the temperature at one of the TEDs rises above 110°C (230°F) in the heat mode or 65°C (149°F) in the cool
mode for more than 4 seconds, the DCSM will record an overtemperature DTC, remove voltage from the
TEDs and go into recovery mode (blower only) for 30 seconds to cool down the TEDs . The same will occur
if a temperature difference of 60°C (108°F) or greater is seen between the backrest and cushion TEDs on
either front seat. The DCSM will continue to monitor the TEDs while in recovery mode. If the temperature of
the TEDs does not drop to 105°C (221°F) in the heat mode or 60°C (140°F) in the cool mode after 30
seconds, the system will continue to cool the TEDs in recovery mode for up to 5 minutes. If the TEDs cool
down at anytime after 30 seconds, but before 5 minutes (checked at 4-second intervals), the system will
operate as normal. An overtemperature DTC will still be recorded even if the system recovers and is operating
normally. Recovery mode is more likely to occur during extreme cabin temperatures with significant seat back
sunload. If the system does not recover within 30 seconds in heat mode or within 5 minutes in cool mode, the
DCSM will disable that seat (fault mode) and remain off until the ignition is cycled. Also, if the DCSM
detects temperature differential fault twice during the same ignition cycle, it will shutdown. When a fault
causes a shutdown, the climate controlled seat indicators will turn off for the affected seat and that seat will
not be operational until the next key cycle.

Could be unrelated, but it never did this before I repaired the wiring harness.  Unsure if it's unrelated or related. 

 

[Gjkrisa]

Well I have just had my seats stop working "heated/cooled" when I got in the car I smelled friend electric but it disappeared shortly after getting in thought it may have been outside and the heated seats where still working but then later I had turned them off for a bit and tried turning it back on I didn't hear the relay click.
So I checked here since the car should still be under warranty I'll ha e them look at it since they need to know this is a possible issue with the car.

Sent from my Pixel 2 XL using Tapatalk

 

[ZSHO]

It sounds like you have a fried pigtail connector! There is a module located  u7nder the driver's front seat towards the front IIRC! Simply raise the seat in the UP position in order to gain access. 
There is also the Heated Driver Seat HVAC Module located Behind the HVAC CONTROLS IN Center Of DASH. Z

https://www.ecoboostperformanceforum.com/index.php/topic,7439

 

[Gjkrisa]

I did read the thread one question did you need to replace the plug again or just the one time?
I'm hoping that Ford replaces the module and plug on warranty I have 300 miles left before the 30k.
Can you spot the wire?
I can
Sent from my Pixel 2 XL using Tapatalk

 

[ZSHO]

I did read the thread one question did you need to replace the plug again or just the one time?
I'm hoping that Ford replaces the module and plug on warranty I have 300 miles left before the 30k.
Can you spot the wire?
I can
Sent from my Pixel 2 XL using Tapatalk

It looks like the BLACK Harness connector! Z

MOTORCRAFT WPT928  -3U2Z14S411ZMB Leads: 12 -Terminal: Tin

https://www.rockauto.com/en/moreinfo.php?pk=2313448&jsn=22

https://www.rockauto.com/en/catalog/ford,2013,taurus,3.5l+v6+turbocharged,1503823,electrical-connector,seat+heater+element+connector,10825

 

[Sbouvia]

That looks very familiar to what mine looked like. Since replacing everything (module/wire harness) has been working fine. I suppose I should put the seat in the up position and see if the wires still look ok. The new black wire hookups make it a little difficult to see if it is burnt. If you are going to swap the harness I recommend taking the seat out and placing on a table and then soldering the new connections together. The wires were quite long.