We ordered our new 2024 F250 with the TPMS option. All you get is the 4 wheel sensors and matching metal valve stems, and the interface module to feed data to the truck. This morning I took the truck to a tire shop to have the new stems/sensors installed, and they weren't able to do it. Our Cougar has aluminum wheels, which Keystone used on just about everything in 2011, so a very common wheel. The hole for the valve stem is counterbored, and the locking nut on the sensor is 14 mm hex. The plain metal valve stem that came out has an 11mm hex. Short story is, you cannot get a socket wrench down into the counterbore to tighten the valve stem. So I brought it all home to stew on a bit

I have ordered a 14mm deep thin wall socket, It might fit, but I'm not confident. The diameter of the counterbore and the spec'd diameter of the socket are the same. But it might work, because the counterbore is tapered up with the contour of the wheel and about half of the hex nut is exposed. Maybe it will squeeze in. Wondering if anyone has had this issue? It is a 15" wheel if that matters.

It's all pretty aggravating and I'm kind of fuming over it at the moment. I'll cool off soon, and you can ignore the rest of this rant if you want. But this "TPMS Kit" cost us almost $600 when ordered with the truck, and all you get is a box with the sensors and communication module. No harness, and nothing to direct you to a correct harness part number. I believe I found it, paid $170 with shipping for that. So I'm in this well over $700 already and seriously thinking I should have just ordered a new TST. At least this harness should support a rear camera if I decide to add that. Wondering what other sensors might be compatible because they are pretty inexpensive. I know they are 433 MHz.

 

You can contact these guys https://nicholsmanufacturingandweldi...625-valve-stem for parts that fit. As I recall Ford is pretty clear about what hole size their part fits, and it doesn't fit all wheels.

Regarding the cable, you should have gotten that along with a receiver box that mounts on the trailer. When I took delivery of my 2022, the dealer had to dig around to find the box. It was back in their spare parts department.

 

Not a hole size problem. I have 0.453 stem holes. It is the outer counterbore that is the problem. Also, I had already searched the Nichols site, hoping to find anything that would help, but they just have the larger stems that you mentioned.

I have had issues with these wheels before. The counterbores for the wheel lug nuts are smaller than they should be too. I had to trim the outside of a star lug wrench so that it would fit, and another impact socket that I use is a tight fit. So I guess it is as much a Keystone wheel problem as it is a Ford problem.

I don't think the cable was intended to come with the TPMS kit, because looking up the kit as well as looking at the Ford ordering site does not show it as included. I did not order the Pro Trailer option, and if I had I think I would have got the cabling, and the Yaw Sensors, etc. I just didn't want a silly dial on my dash for backing up a trailer. This morning, having taken a fresh breath, I think my only fault with Ford is that they did a poor job of explaining what was included with the kits when ordered as an option on the truck. But that's pretty much true of all of the options on the Ford site. My salesman wouldn't have had a clue either.

 

I suspect if that thin wall socket is too tight it would be ok to grind it down a little. It would be designed for a lot more torque then a valve stem will need.

 

I agree. I can spin it in my lathe and easily take a skim off. But that bothers me too, if I needed tire service on the road. Not too big of a deal to carry that socket I guess.

I also ordered something called a "valve stem service kit". It's basically a new schrader valve, a seal for the base of the metal stem, and more importantly a new lock nut for the stem. But it was a guess, because there are no specs published for what thread is on it. The stem is something odd, like M10x0.9. Best I can measure it anyway, and that is not a standard metric thread. The kits were cheap so I just eyeballed it.

 

Maybe the newer trucks are different, but I’m not sure how it would work without the receiver and cable. Wireless signal from the tpms stems goes to the receiver, usually mounted on the trailer but sometimes in the truck bed if the trailer is short. Then the receiver is hardwired (with the cable) to the plug in the truck bed. Even if you didn’t get the extra plug in the truck bed, they also include an adapter for the plug in the bumper. I don’t know how the readings can show on your dash without the receiver and cable, and the price you paid sure sounds like what I paid for mine. Again, I had to ask the dealer for my extra stuff that came in a separate box, which they found at the spare parts department. Good luck though!

 

I'm not sure Ken, but I suspect your truck was ordered with Customer Placed Camera AND Customer Installed TPMS, and maybe even the Trailer Blind Side Monitor options. I can see where at least one of those should include the harness, and of course they wouldn't want them to each include a harness as that would be redundant. Or possibly you have to order the Pro Trailer option, which has a harness for 4 things - Camera, TPMS, BLIS, and a Yaw sensor for the backup steering ****. I only ordered one of those things, the TPMS. I found that there are two harnesses, one that includes all of that, and one that includes all of that except NOT the Yaw sensor connector.

The box that the TPMS sensors and the communication module (which I have BTW) came from Ford, has my VIN on it, and has a kit part number on it. When I search that kit part number, it is available from many parts houses and they all show parts and no harness. The box is too small for a harness to have ever fit in it.

I think my point here is that Ford leaves us groping around to figure out what to purchase. That annoys me more than the fact that I had to purchase something extra. Particularly since it is clearly labeled, and obviously something that the customer will have to install on their own. They could at least provide some part numbers. There is an installation instruction sheet after all, how hard would it have been to list some part numbers? I don't even think a dealership would be interested in installing it if I showed up with my trailer in tow at their service door.

I'll probably add the part numbers to this thread later. I want to be sure I've got the right stuff so that I don't mislead anyone facing this in the future.

 

Trailer BLIS wasn't available on the 22 model year trucks so the harnesses were either two way (camera & TPMS) or three way (camera, TPMS & Yaw Sensor). You are correct, I have all three on my truck even though I never use the back up assist feature. When I bought it I had almost no experience pulling trailers so I wanted all the help I could get. But, for me at least, that **** turned out to be way more confusing than just putting my hand on the bottom of the steering wheel and using the mirrors.

I still can't believe they didn't include a harness with your kit, even if you only got TPMS. I'd be frustrated with that too. For what it's worth, I'd recommend getting a harness that handles TPMS and the camera just in case you want to add one later. I use the camera to see what's behind me before changing lanes, which is especially handy in city traffic where people drive like it's a NASCAR race.

It sounds like you're on top of it and when it's all said and done I bet you'll be very happy with the TPMS system. Mine shows pressure and temperature so hopefully the new system does too.

 

Okay, here is what I came up with. In the image below, the top stem has the nut that came with the Ford kit. It has a 14mm hex, and is short so it needs to nest down in the wheel counterbore. The bottom stem has a nut from a kit I ordered from the 'Zon. It has a 12mm hex, and has the added benefit of a longer barrel, so the nut is not so deep in the counterbore.


These are the parts that came in each kit. The kit is intended to service TPMS stems, and I'm not sure what brand of stems. But the nut is the correct thread pitch and that is the only component of the kit that I will use. The only negative IMO is that it is aluminum, and the original was SS. The important thing is that the threads were correct for the Schrader stem.


This is the kit part number for anyone facing this in the future.


Here it is installed in the wheel. A standard 12mm socket fits it nicely. Doesn't even need to be deep or thin wall. Dang, I need to clean these wheels!


Here is the sensor side installed in the wheel.


Still waiting on the harness cables to arrive.

 

Nice, and I wouldn't have a problem with aluminum nuts at all. Good solution!

 

I now have all the pieces to finish up the TPMS and Trailer Camera system. Today I layed out the harnesses and tested the system. I decided to test functionality before I got too invested in cutting holes in the trailer for onboarding the cables. I'm happy to say that the TPMS sensors paired up with the truck first try, and the camera was simply plug and play. The cables were just laying along the ground, and I tested a couple of locations for the camera on the rear. Most people I've seen mount the camera up at the rear ridgeline, but I found the view more useful with the camera at about 4-5' above the ground. Roughly the same height as the tail gate camera on the truck. Next I will workout the various penetrations for permanent install.

For anyone wanting to do this to their 2023 or 2024 Super Duty, below are the components you will need. Your truck will need the 360° view system to be TPMS, Rear Camera, and Trailer BLIS ready. I guess you need the Pro Trailer option with the dial on the dash for backing up, which is what the Yaw sensor does, but I'm not doing it and don't have any details.

For any of these customer placed options you will need the Base Harness. There are 2 versions of that harness. One includes the Yaw sensor and the other does not.
Base Harness with Yaw connector is p/n = PC3Z-15A416-A
Base Harness without Yaw connector is p/n = PC3Z-15A416-B (I'm using this one, because I am not doing Yaw sensing)

The TPMS kit comes with the sensors for 4 trailer wheels, and the module which communicates wirelessly with the sensors, and via the base harness back to the truck. The part number for this kit is PC3Z-1A189-J. In my case I ordered this with the truck, but you can simply buy it from any Ford outlet. No harness comes with this kit, it connects via the above base harness.

The Rear Trailer Camera comes with 49 feet of harness cable, and it too connects to the base harness above. This kit is part number PC3Z-19G490C. This is basically a long jumper harness. You can buy a longer one for the longer trailers.

So those are the part numbers I used. I'm not doing the BLIS (trailer blind side monitoring) but it is supposed to tee in somehow to the base harness.

One last thing. I used the Motorcraft TPMS 19 tool to pair the TPMS sensors to the truck. It worked great and fast. It wirelessly actuates each TPMS sensor when held close to the valve stem. The truck tells you which wheel to do next, and you work your way around the trailer actuating each sensor and waiting for the truck to verify a successful pairing. Once all 4 were done I instantly had trailer tire pressure and temperature displayed on the dash. To do this without the TPMS 19 tool requires releasing air pressure from each tire until the truck senses it, which of course requires a compressor to air back up. Not very roadside friendly. The tool was less than $30 on Amazon and I think well worth it, now and whenever rotating tires in the future.