None of the front or rear heated seats in my 05 XJL are working but the heated steering wheel does!

 

First thing to do would be to check fuses.

 

When you press the switch, does the switch light up?

 

Just had the same thing happen to me. Dealer could not figure it out. All fuses and relays they say are ok.

Anyone have a suggestion or solution?

2005 VDP

 

Move to South Texas? Just kidding!

 

My rear end is really cold and I miss the seats being heated.
Everyone seems to be lost on this one.

 

Somebody please answer his question!

 

My switches light up. My steering wheel heats just fine.
I am told there is a heating grid in each seat and that is something that the dealer could check but I can't figure out how 4 separate ones quit at the same time?

 

You are right, that doesn't seem plausible that all four could go bad at once. It must be a wiring issue. Does anyone have any wiring diagrams for the electric seats?

 

The JTIS I have only goes up to 2003, and I can't find a common point for all 4 seats to fail. I'd need an 05 wiring diagram to help on this one. But based on earlier models, the switch lighting up indicates the switch is ok, and the body processor module is providing a ground for the light and the seat heater relays.

 

See attached, it is hopefully everything you need.

Regards

Richard

 

Thanks Richard. I still don't see a common failure point. Are you REALLY sure the rear seats don't heat? It takes some time for the heat to come through and warm your buns, they are not hot as soon as you sit on them, even if they have been turned on for a while.
I can see various failures that would take out either the front seats or the rear, but not both.

 

Tomorrow I am off to the Polar North where hi temps are maybe 14' or so.

Took the VDP in and they fixed the heated seats.

Inner Connector Grid had a pin displaced and when put back in they worked?

I am spoiled by them and look forward now to my trip.

Kudos to Stephen @ Aristocrat Motors in KC.

 

Heaters in both my front seats are on the blink: four heating elements, three dead, one barely working. Initially I though all had gone Tango Union simultaneously and looked for a problem well upstream. Finding nothing that would account for simultaneous failures I concluded that the elements have been failing individually without being me noticing. After all, I never sit in the passenger seat and the driver's seat may elements may have broken during the warm months and, naturally, went unnoticed.

Anyhow, the only point I'm trying to make in this rather long winded way is don't assume that both sides being inoperative means that they both died at once.

Cheers
DD

 

Displaced pin? Does that mean it's in the connector or in the actual grid?

 

The tech mentioned that the seats were wired in series and not parallel so I just assumed if one pin was out of a grid that it shut them all down?

They are working great and I needed them in 1' weather.

 

I don't know what a pin means in this context.

 

A electrical contact pin inside a plastic bodied connector.

Cheers
DD

 

Interesting! I wonder how one could become dislodged or bent, without disconnecting the connector at some point!

 

They supposed to be locked into the connector body but if it was incorrectly assembled when new a pin can "back out".

Not sure about the pins in this particular example but, often, they are small and delicate....wouldn't take too much ham-handedness to damage them when joining the connector halves

Cheers
Dd