Upgrading seat swap from tradesman (Heated seats)

[brental1]

Fiat was really sneaky on this, at least on my truck 2022 BH Level 1 EQ.

While the Fused B+ (I don't have my diagrams handy), I think the 2.0 MM RD for the seat motors was present in the Yellow connector under the passenger seat, I discovered from Jimmy07 that the wire was not continuous to the Power Distribution Center. Follow the harness from the Yellow Seat Connector. At the first connector junction, I think you'll see that there is no mating 2.0MM Red in the other connector. You need to run a wire from this connector to the Power Distribuiton Center. I have no idea why they would "give away" half of a wire.

 

[brental1]

Fiat was really sneaky on this, at least on my truck 2022 BH Level 1 EQ.

This is one of the diagrams I made and posted on another thread. It was Pin 25 on the Yellow Passenger Seat connector, that I highlighted in Red, indicating that the wire was present in my truck. But, as I posted, this is the one that is not continuous to the Power Distribution Center. BTW, I did not need to flash my truck. After I added the (numerous) wires and swapped the Center Stack for one with Heated/Vented Seat and Heated Steering Wheel switches; everything worked. There are no soft buttons present on my screen; but the hard buttons work fine. I may flash things later; but for now I can live with the hard buttons. BTW, I have a center stack available with Heated Seat/Steering Wheel Buttons (No Vent Buttons). Originally, I was going to add Heat only; but changed by mind when the donor seats were also vented.

 

[brental1]

I have this Center Stack with Heated Seat and Steering Wheel Switches. 8" Ram Center Stack Climate Control | Part no. 68340286AC and 68340286AD | eBay

 

[23RamBH]

Fiat was really sneaky on this, at least on my truck 2022 BH with Level 1 EQ. While the Fused B+ (I don't have my diagrams handy), I think the 2.0 MM RD for the seat motors was present in the Yellow connector under the passenger seat, I discovered from Jimmy07 that the wire was not continuous to the Power Distribution Center. Follow the harness from the Yellow Seat Connector. At the first connector junction, I think you'll see that there is no mating 2.0MM Red in the other connector. You need to run a wire from this connector to the Power Distribuiton Center. I have no idea why they would "give away" half of a wire.

That is exactly what my problem was. The Yellow seat connector had all the correct wires. The B+ & Grnd weren't actually connected to anything though . Once properly connected, everything worked!

 

[brental1]

That is exactly what my problem was. The Yellow seat connector had all the correct wires. The B+ & Grnd weren't actually connected to anything though . Once properly connected, everything worked!

I don't remember my ground not being connected. That's even crazier than the B+. Glad you got it working!

 

[brental1]

I would not rule out the possibility that the required power wire or wires are not there on your body harness. brentals 2022 didn't have the power wires. When you get a chance unplug the passenger seat connector(should be able do do it without removing the seat) and confirm these wires are in it. These locations are based off my 2021, but I don't think they would have changed.



View attachment 176964

I would not rule out the possibility that the required power wire or wires are not there on your body harness. brentals 2022 didn't have the power wires. When you get a chance unplug the passenger seat connector(should be able do do it without removing the seat) and confirm these wires are in it. These locations are based off my 2021, but I don't think they would have changed.



View attachment 176964

Just to clarify, the red wire (top right in your pic) was present in my truck. There was an intermediate wire that was missing in my truck. That's why I said they were sneaky. While this wire was present, there was no power to it. The mating wire at the next connector was missing. Hard to unerstnad why they would have deleted the intermediate wire?

 

[Wdf]

This was a great post! I have a semi related topic and since this one deals a lot with wiring and pinning, I'm going to tack on here.

I have a 2023 Ram BigHorn Level B equipment group (Heated Steering wheel & seats, Power driver seat). Threads here on the forum suggests that swapping seats in this equipment group for Driver / Passenger Powered Leather was plug and play. I picked up a pair of Laramie seats from a 2019 Ram. The only variables I had mechanically was locating the appropriate holes in the rear of the cab to accommodate the back of the rear seat frame rail. Mine were simply covered by carpet, as the reclining frame is just a little different. Also had to swap the hooks the rear seats hung from to striker plates, which were about $30 for the set from my local dealer.

Now for the fun stuff..... I want to believe that the passenger power seat switch is bad. After installing the seats, I tested out the power functions. All functions on the driver seat worked as they should, including the things my Equipment B option did not have. The passenger seat forward / backward and recline functions don't respond at all. However, the Lumbar features (which did not exist on my level B equipment group) worked in all directions, as did the heat (which was part of my equipment group). I removed the seat and inspected the wiring, which checked out (no chafing or grounding issues). I unplugged each motor and tested them individually in all directions, which all checked out (I direct powered each motor individually to adjust the seat in the truck after bench testing - we needed the seat in a comfortable orientation for a trip last weekend). I've read here that the passenger seat does not require a BCM update as it is ready to go as is the yellow connector on the passenger side IF the equipment group had the power + heated driver seat.

Wanted to see if there were some recommendations of things I might also consider - or if ordering a new switch is the proper next step. I might need a reference link on how to remove the trim panel. I see it has two screws, and when removed, the plate is still snugly attached with all sorts of mechanical attachments points. I aborted going any further at that point until I knew if the switch was likely the culprit.

Thanks for reading and any support of suggestions you might have to offer!

Did you figure this out?
Do you know if your donor seats came out of a mega cab?
I had the same issue. The lumbar worked but nothing else. Swapped in a different seat set and had no issues. It was because the seats came put of a mega cab and the pinning on the harness was different

 

[Quietpeen]

Did you figure this out?
Do you know if your donor seats came out of a mega cab?
I had the same issue. The lumbar worked but nothing else. Swapped in a different seat set and had no issues. It was because the seats came put of a mega cab and the pinning on the harness was different

from what I remember it wasn’t the seats, it was that his IP harness didn’t have the power wires run in it.

 

[brental1]

Did you figure this out?
Do you know if your donor seats came out of a mega cab?
I had the same issue. The lumbar worked but nothing else. Swapped in a different seat set and had no issues. It was because the seats came put of a mega cab and the pinning on the harness was different

See my earlier post. The large red wire (I don't remember the pin number; but think it's one of the corners) was present in my yellow connector under the passenger seat. So, I assumed there was B+ to it. But, for some reason, Fiat deleted an intermediate wire. Follow the seat harness from the yellow plug toward the front of the truck. When you find the next connector, see if the matching red wire is present. It wasn't in my truck. I had to add that wire--from the intermediate connector to the power supply in the driver's kick panel area. I have no idea why the wire would be present in the yellow seat connector; but not continuous to the power supply.