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Heated FL Front Seats Wiring & Control

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polilara:
Hello, read here
https://www.omegaowners.com/forum/index.php?topic=149084.0
and other places too, that FL front seat "heaters aren't known for their durability"...
So mine are broken, too, 2001 FL (Elegance) Tried to check the wiring a bit...

So, five Connectors, below is what I think?
Yellow=Side Air Bag
White or Light Gray with Brown and Blue wires=Seat Belt Tensioner
Grey with Brown and Red=Electricity to Standard Seat up&down control motor
Green with Black having Yellow stripe and another Black having Green stripe indicates 11kOhm resistance. Is this the 'heating controller' unit (PTC/NTC) resistor TB discussed in link above? Temperature was +10 degrees Celsius.
Black with Black and Brown, resistance here is infinity so if this is the heater units (in series) one of them certainly broken.
If it is as described above:
1. What should be the resistance of the heater unit when ok?
2. How does the control work, is it On/Off according to temp measurement (1-5) or are there resistors somewhere which gives 5 different Voltages?
3. What is typical place to find failure if heater unit is broken?

Doctor Gollum:
On the heating element itself.

The end of the wiring at the seat connection is pretty bombproof. The heater pad itself flexes and breaks. Shorts cause hot spots and the resistors fail.

STEMO:
I have hotspots on my drivers seat too.  ;D

Doctor Gollum:

--- Quote from: STEMO on 19 January 2022, 15:02:02 ---I have hotspots on my drivers seat too.  ;D

--- End quote ---
Matching stains too I shouldn't wonder ::)

Nick W:

--- Quote from: Doctor Gollum on 19 January 2022, 14:59:41 ---On the heating element itself.

The end of the wiring at the seat connection is pretty bombproof. The heater pad itself flexes and breaks. Shorts cause hot spots and the resistors fail.

--- End quote ---


The seat bases are the same for both front seats. Which means you can fit a passenger one to a driver's seat in a few minutes. They get a lot less use, so the heat pad is much more likely to work, the trim won't be as worn, and the foam will be in better condition.


This was one of the better things I did to my car.

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