Installing factory trailer brake system (2024 Tremor XLT)

[Marcabus1234]

Hi everyone,

I am looking to tow a small camper with my 2024 tremor. I am looking at some campers that are within the 2000lb towing capacity but most of them still have electric brakes. I'm aware of all the potential issues of towing beyond the rated 2000lbs and don't want to get into a discussion about how I shouldn't be doing what I am doing (so lets all stay positive here lol).

Anyway I was looking at adding an aftermarket brake controller but I just can't get over how crappy they look and I would love to keep the truck looking as stock as possible. I do have the factory hitch and 4 way connector already and there is a trailer module installed from the factory behind the rear seat.

Looking into things on the Ford parts website comparing my vin with a vin from a factory 2024 XLT with the 4k package. The trailer module that is factoring installed in my truck is the same unit used in the 4k models with the trailer brake controller. I also compared the as build data from both vins and it looks like there are only a few lines that would need to be edited in Forscan.

As for pars I would need. I will need the actual brake switch in the dash, the trim to accept the switch (or I may 3d print a trim piece and cut a hole in the stock part not sure yet). I will then need the all the electrical pins to add to the factory connectors, and the 7 way plug to mount on the hitch.

I have been researching this a ton and reviewing the factory electrical schematics, manuals, and parts listings and this doesn't seem like a terribly hard modification. I also have been searching on multiple forums as well and haven't been able to find anyone who has done this. The only issue I am running into is ford doesn't sell the connector to plug into the dash mounted trailer brake switch. However they do list a part number for the pins in the connector. I may end up trying to find a connector I can cut out of a salvaged vehicle as it's the same connector used in the F series trucks or 3d print my own connector body not sure on this part yet.

If anyone has done this I am all ears and eyes open to any tips or advice. I will also follow up with pictures and information on the modification as I work through this so others may benefit from this as well.

Below I will attach some pictures of the schematics, my factory trailer module, and some of the parts I will need to acquire for this for reference.

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[BlueSpec1]

I was checking out the TBC switch SW8839 and its connector.
It looks like a Molex Mini50 1x4 pin.
Molex Application Specification Mini50
https://www.molex.com/en-us/product...omotive-pcb-wire-connectors/mini50-connectors
https://www.molex.com/en-us/products/part-detail/2065230041

Mini50 connectors are used in the 22-24 for: IPMA, OH Console, USB Port,

Mouser: https://www.mouser.com/ProductDetail/Molex/34791-0040?qs=rBzrYveeBvGWumEv8OAfXw==
CTX40 Female Terminals:
https://www.mouser.com/ProductDetail/Molex/560023-0423?qs=VBGyBZiQP4FcAwf7Q4sJjw==
https://www.mouser.com/ProductDetail/Molex/560023-0721-Cut-Strip?qs=ST9lo4GX8V3JJe/HrzCoEw==

Edit:
Trim Panel: Column Cover - Ford (NZ6Z-2604459-BA)
https://www.fairwayfordparts.net/oem-parts/ford-column-cover-nz6z2604459ba

 

[Marcabus1234]

Thanks BlueSpec that looks perfect

 

[Hot Runr Guy]

I bought the 7+4 connector # nz6z15436d a while back, to eventually retrofit in my '24 Tremor. The body harness that your flat-4 plugs into has the same 12-pin connector on it, so it will plug right in, although you'll need to populate the 12V power, reverse lights, trailer brakes, and a 2nd ground wire they use.

HRG

 

[Marcabus1234]

I saw the same thing in regards to the plug. Most of this looks like just running a few wires and adding some pins into the factory connectors. Then obviously programing in Forscan. Its looking like I will be able to get this all done for about the same $ as a good aftermarket controller as well and this will be a way better solution in my opinion.

IDK why ford never added the 4k package to the tremor. It already had the lower gearing and trans cooler. The only thing it's missing is the larger radiator which may not be a huge deal anyway unless you really push the limits with it.

I also just added the airlift 1000 bags to it as well. I wired in the pump and made a gauge and power panel that I mounted in the bed.

 

[Marcabus1234]

I just placed an order for the molex connector and pins you suggested BlueSpec. Now I'm putting a parts list together to order at Ford but I'm running into another snag on some of the pins listed in the manual. Just searching online at a few Ford parts sites and there is nothing coming up for most of the pins listed in the manual.

Ford may be able to get them if I go to the dealer but I was wondering how you are able to identify different pins to order generics from mouser or digikey. I know in the past I have ordered a few pins from Ford for the adaptive cruise control retrofit and they were insanely expensive for what they are. I'm assuming if I could order through mouser or digikey I could save probably $50 on just pins alone. I can list the Ford part numbers I need for pins in a follow up once I get all the #s together but I was Just curious how you went about identifying them to figure out if they are molex or something else and which actual pin they are.

 

[Marcabus1234]

So I just confirmed that all the fuses are in place for this from the factory already in both fuse boxes. I also confirmed that I will need to populate the pins in the connectors at the battery junction box and run those to the trailer module. Then run the wiring from the trailer module to the dash switch and to the trailer connector at the rear.

I now need to figure out what pins are used in the connector at the battery junction box (fuse panel under the hood). I was able to successfully identify the pins required for all the other connections that need to be made and have ordered all of them.

Any help identifying these pins or this connector type would be a huge help.

Picture of the connector at the battery junction box.

 

[BlueSpec1]

Got sidetracked, didn't post this yesterday.
I'll look at the BJB connector.
Today I guess you're looking at the BU/RD wire that's not on the TRM LH Connector = BLACK = C4397B that runs to BJB.
I have +12V at the other 2 wires to my TRM.

6-22:
I usually see if I can get a part number off the connector.
Search on Ford's service part# for the terminal
Search on the pigtail part number to see if one of the hits might show Mfgr or PN on it.

Maverick & Escape use Molex, TE Connectivity, Yazaki as well as some others.
My Bolt has a lot of TE Connectivity, Sumitomo.

See if someone else found the part numbers:
Mabcim Post 705
https://www.mavericktruckclub.com/forum/threads/cheap-auto-dimming-homelink-mirror.8346/post-360643

SYNC MODULE [APIM]
C2383A Terminal Service PN = 9U5T-14474-DB
https://www.connectorpeople.com/Connector/FORD/9/9U5T-14474-MA
https://www.f150forum.com/f118/2018-c212-c238-connector-terminal-identification-542574/

Use some of the auto connector catalogs:
https://www.molex.com/en-us/product...e-connectivity/automotive-pcb-wire-connectors
Molex Transportation Connectors

https://www.te.com/content/dam/te-c...al/Terminals and Connectors_TS-ICT-T&CCAT.pdf
MCON Interconnection System https://www.te.com/content/dam/te-com/documents/automotive/global/1308070-4 MCON8.pdf

Looking at the Maverick TRM connectors on my Maverick today:
C4397B - PN on it is 34927-0140, Color Black
Search on PN = Molex CTX Hybrid Gen Y Receptacle, Polarization Option A
Product Spec PDF

C4397A = PN on it is 34927-0141, Color Gray
Search on PN = GEN Y ASSY RCPT 14 CKT HYB GRY POL B

 

[Hot Runr Guy]

Just an FYI I learned while playing with the taillight connectors, at times the color may indicate a difference, since there can be subtle changes in the keying between the male & female sides.

Just something to consider, if you see multiple versions of what appears to be the same connector shells.

HRG

 

[BlueSpec1]

Just an FYI I learned while playing with the taillight connectors, at times the color may indicate a difference, since there can be subtle changes in the keying between the male & female sides.

Just something to consider, if you see multiple versions of what appears to be the same connector shells.

HRG

Yes, that's the Polarization Option (Keying) on these 2 connectors BK=A, GY=B

Easier to see the polarization difference on the Male side:

 

[BlueSpec1]

I don't see a fuse connection for Trailer Charge wire on BJB box I have on hand.

 

[Marcabus1234]

OMG lol thanks for all the info guys that's super helpful.

BlueSpec I do have that fuse in mine. I have all the trailer related fuses populated and I checked the connectors as well to make sure they have headers there also and they do. The only thing that's missing on mine seems like the actual female pin nad wire in the harness side plug. I wonder if it's a hybrid vs Ecoboost thing or something.

Edit: I didn't get a picture of the connector side of the BJB but I will post that tomorrow when I get a chance.

 

[BlueSpec1]

OMG lol thanks for all the info guys that's super helpful.

BlueSpec I do have that fuse in mine. I have all the trailer related fuses populated and I checked the connectors as well to make sure they have headers there also and they do.
The only thing that's missing on mine seems like the actual female pin and wire in the harness side plug. I wonder if it's a hybrid vs Ecoboost thing or something.

Edit: I didn't get a picture of the connector side of the BJB but I will post that tomorrow when I get a chance.

Which harness connector are you asking about above, BJB or the TRM Trailer Module?

 

[Marcabus1234]

I'm looking for pins to populate the open slots needed in the BJB connector.

 

[todd92]

No need for a brake controller on a 2000 lb trailer.

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