Sorry I was a bit scarce this week, back of the house got shredded by the leading edge of a tornado, that cut a 500' path through town.

Fuses :

Battery Junction box fuse #118, 30 A, hot at all times to both front seats.
1. This is the Red w/ black wire on both heated seat modules, should have power no matter what ( check fuse and meter connector, pin 4 on controller ).

Central Junction box Fuse #23, 10 A, hot in run position power to heated seat switches ( both ). Check fuse, and the white w/ light blue stripe on the switch on the side of the seat ( if they were in the same place as my 2001 XLT ). If the LED on the switch goes on, this should be good ( should being the optimal word, still check it ).

The seat bottom has both the heater and the temp sensor in it. If the temp sensor is broken, the heated seat module would think it is hot enough at all times, and shut off.

Check the passenger seat for the voltage at pins #1 ( brown w/ light blue stripe ) and #7 ( black w/ light blue stripe ). This is from ground to pin #1, and from ground to pin #7 ( 2 tests ).

one pin should be +12 V and the other something else less ( or the same when you start / end ).



This is testing the function of the Thermistor that tells the heated seat module when the seat is hot enough. Once you know the start of heating on both pins, and after operating for 15 min ( or until it shuts off ) you can perform the same test on the driver's seat, to find out if the problem is with the temp sensor in the seat bottom heater.

If the Thermistor acts the same, next thing is to check the switch to the heated seat module.

Good luck, let us know what you come up with.

 

These look close to what I got for Nikki's car, but this is a 100% swap out, the factory switch is no good anymore.
PITA , you have to strip the covers, and cut the foam down where the pad is at, so you can install the cover back over it.

They don't have the 2003 listed, but the 2004-2007 is listed 63.03 for the seat bottom. This is marked as the seat cushion, which might mean you get a new bottom seat cushion with the element built into it ?? email to any of the big 3 online places would prove useful, depending on what the outcome is here with the testing.

 

Installing the heated seat kit is not hard to do. When I did mine I took out the seat so all things were mounted on the seat and this just left the hook up to the power supply.
Easeing the seat cover enought to slide in the heated mat is the toughtest part. Make sure the mat sits flat and the wires are not pinched or might be trapped when moving the seat back.
Just follow the instructions carefully and all should be fine.
I love mine, my F150 takes forever to warm the cab in winter and the heated seats keep me warm till the cab has warmed.

 

The seat bottom has both the heater and the temp sensor in it. If the temp sensor is broken, the heated seat module would think it is hot enough at all times, and shut off.


Then i dont think its the temp sensor, because the switches light stays on the whole 15 min then shuts off and the seat never gets hot. Unless the light will stay on the 15 min even if its not heating.

 

Well i order the heating kit from heatmyseat.com. As i went through check out they had an area where you put the Vehicle and Model so hopefully every thing fits.

 

Why would you buy a new seat heater kit when your truck already has everything just a module or wiring problem?

Does the passenger seat get hot?

 

yes, the passanger side gets hot as i stated in one of my first posts. Its not the module because i switched the passanger module with the driver module, it still doesnt work and the passanger side does. I checked the fuses they all are ok and none of the wires where lose. The seat stays on 15 but never gets hot so i dont think it has any thing to do with the temp sensor. The only thing it could be in my mind is the heating element or a short in a wire.

 

I'm confused, 4x4King. In your original post, you said you exchanged the passenger and driver's side heater modules. After doing this, the passenger side still heated and the driver's side was still dead.

What are these modules? Do they contain the heating elements? If so, the elements are fine. If not, do these modules "plug in" somewhere? If so, since you know both modules are good (both work on the passenger side), can you probe the supply plugs to the driver's side with a voltmeter to see if it is getting power?

If there's no power, the problem is upstream of the module. If there IS power, the problem is downstream of the module.

I know I'm not being a whole lot of help, but this is how I would approach your problem. And yes, without even knowing what the heating elements look like, I know they CAN fail. I'm sure they're a simple resistance circuit, like in an electric blanket, that will stop working if there is a wire break.

- Jack

 

Here is a pic of the heated seat module that i switched between the passanger seat and the drivers seat, and got the same results of the driver side not working when the passanger side is working.





Jake i think the heating element is the pad the heats up in the seat

 

Thanks, 4x4King - my post was a bit "strange" shall we say? I did not realize there was a second "page" of posts after RockPick's "bump" and I wrote what you saw based on only the posts before the "bump".

After SSCULLY's post, I understand what the module is.

Before you take the new heater out of it's wrapping (maybe too late), I highly recommend you try SSCULLY's troubleshooting instructions. He knows his stuff. You might be able to repair that thing with less fuss and expense than if you try to install a completely new system.

SSCULLY! Glad you're all right! I never want to experience a tornado!

- Jack

 

Thanks for the kind words Jack. I'm a lot luckier then the people east of me, they got leveled from what the Police told me Monday night when they were checking on people. Nobody can recall the last time one was this close to the city.
Both Neighbors got skylights, when they lost sheeting material, loaded with shingles.
I found part of someone's roof pushed into my Maple tree in my back yard.


All in all, I think I am the luckiest one this close to the leveled houses.

 

OK, i have been searching the internet and came across this
http://www.ford-trucks.com/forums/53...ted-seats.html

Im really hoping this is the issue of just the wire getting fried. if so im going to put the heated seat kit i ordered in my back seat

SSCULLY thanks for the diagram but im not to good at figuring that stuff out.

So thursday when i get the kit i order ill pull out the seat an see what wire are hopfully roasted, because its a simple fix. ill keep you guys posted.

 

Wow! Great picture SSCULLY!

Takes something like this from Mother Nature to show us where we rank in the scheme of things, eh?

- Jack

 

Well i took my seat out today holy chit it is a PITA. i got the cover of the seat and then i saw it..... There are wires that run thought the element to heat it up and when i took the seat cover off i saw where one of the wires in the element burnt into. So i replaced that section of wire and now my butt is nice and toasty . To do it i just followed the directions that people gave in the link i posted above.

The heated seat kit i order in the mail i will save so if the seat goes bad again ill replace it completly. There is no way in hell im going to put the kit in one of my back seats its way to much work. I have cuts all over my hands from trying to get the seat covers off.

 

Good on you, 4x4! i think it's great when we can repair, rather than relpace things that are "broken".

- Jack