Rear heated seats
 

Hey guys. Recently picked up a 04 4.8iS and drive it back from NY to TX.
The rear heated seat worked, or at least the light came on when pressed. But when I got home, while cleaning it out. Press the rear seat heater buttons and nothing.
I've popped off the seat bottom. Vacuumed out the years of debris and checked the wires. Al looks good. I removed the back of center console and checked the buttons. Why're still locked into the harness and nothing.
I've checked the fuse. They're good. No heat on the back seat.
No errors in INPA.
What else can I check? Any clues, ideas?

Thanks.



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Just a WAG but maybe there is a pressure switch that activates the heater element when it senses a person sitting in the seat. Try it while sitting in the seat for 5 minutes and see if you get heat.

Woah. Is that it? No way. I'll have to try that. I hope thats it. I'll feel stupid, but I'd be happy.


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My 2003 rear heated seats were inop also.
I lifted up the rear bench to find that the harness was
not installed. Perhaps your wiring isn’t clipped tightly.

When I lifted the seat to clean it. All the harness looked fine. Everything plugged in and nothing seemed out of place or damaged.


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Just checked. Unfortunately this didn't make a difference. :(


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I had rear heated seats in my 04 as well, there is no pressure sensor that activates the heating element as Calipsoe suggests

Have you ohmed the seat heating element to verify that there is no break in the heating element?

No, I have not. Can I check the element without having to remove the covers?


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Just disconnect the seating element at the connector and use an ohm meter to check for continuity.