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Heated seats not working

Tiny
BURDEDW
  • MEMBER
  • 2007 LINCOLN MKX
  • 100,000 MILES
When the button for the heated front seats, either left or right, is pushed, the light comes on for about 4 or 5 seconds then goes out. The seats do not heat up.
I checked the fuse under the hood, it's good. I checked the wire harnesses under both front seats and all connectors seem to be plugged in and tight.

I believe it's something they both have in common, but I'm not sure what.
Do you know if there is a relay that controls both heated seats?
If so, what is the location?
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Wednesday, October 30th, 2013 AT 12:54 PM

8 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,054 POSTS
Hey BURDEDW,

There is a heated seat temperature module that may have gone out, here is a wiring diagram that will help you test the circuit to see whats going on. Test for power and ground and if it has them both then the module has gone out.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Run some tests and get back to us so we can continue helping you.

Best, Ken
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Monday, January 30th, 2017 AT 2:15 AM
Tiny
BURDEDW
  • MEMBER
  • 1 POST
This was a little above my pay grade so I took the car in and they said what you did and replaced the module car is all fixed! Thanks, I cant believe this site is free. God bless
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Saturday, February 4th, 2017 AT 2:10 AM
Tiny
MATMURE23
  • MEMBER
  • 1 POST
I have the same issue only the lights stay on but heat and cold is not working on both passenger and driver seats. Thought?
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Saturday, December 26th, 2020 AT 6:46 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,054 POSTS
Yep, this is a classic module problem, but first did you check the fuses? Here is a guide and the fuse locations so you can check it out and get back to us:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

test with the key on. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.
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Saturday, December 26th, 2020 AT 12:54 PM
Tiny
TYLER GRAHAM CORSON
  • MEMBER
  • 2 POSTS
I'm having the same issue, with the climate control front seats both turning on for a few seconds and turning off. I'm looking at the diagrams and charts that have been shared but I'm not sure where or what I should be checking. Like what fuse to check I guess would be the start, or how a single module effects both hot and cold and both from seats. Rear seats work fine though.

Thank you
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Monday, March 8th, 2021 AT 7:17 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi Tyler,

Is your vehicle the same year, make, and model? I need to know that to make sure I'm looking at the right schematics. Oftentimes, they use circuit breakers on these rather than a traditional fuse. If something is drawing too much power, it will kick the breaker and then work again later.

Let me know.

Joe
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Tuesday, March 9th, 2021 AT 4:40 PM
Tiny
TYLER GRAHAM CORSON
  • MEMBER
  • 2 POSTS
I hadn't heard of that, but yes it is the same year make and model. 2007 Lincoln mkx.
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Thursday, March 11th, 2021 AT 4:10 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,300 POSTS
Hi,

This is powered via a traditional fuse. If you look below, I've attached a few pics. The first two are the entire wiring schematic for the heated seats. I circled two fuses in pic 1 that are related. I need you to check them. In addition to checking the fuse condition, make sure there is power to and from them.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If you look at pics 3 and 4, they show fuse locations in the boxes. Pic 3 is the box under the hood and 4 is under the dash on the driver's side.

Let me know what you find.

Take care,
Joe
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Thursday, March 11th, 2021 AT 3:43 PM

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