2025-2026 Ford Maverick Trailer Brake Module: Programming, Faults, and Replacement

Programming and Activation: The Most Critical Step

Whether you are installing a new module, a used OEM replacement, or adding the controller to a truck that didn't have one, the module must be programmed to the vehicle. Simply plugging it in is not enough; the truck's main computers need to be told that the module exists and is active. Without this step, the module will not function.

Programming Options

• Ford Dealership: A dealer uses the Ford Diagnostic & Repair System (FDRS) to activate the module. This is the official method and ensures all related systems are correctly configured. Labor costs for installation and programming can range from approximately $200 to over $400, depending on the dealer.
• DIY with FORScan: Many owners and independent shops use a powerful software tool called FORScan with a compatible OBD-II adapter to program the module themselves. This involves connecting a laptop to the truck and changing specific values in the Instrument Panel Control (IPC) and Body Control Module (BCM) to enable the "Trailer Brake Controller" and "TBC Gain Setting" features. This is a cost-effective option for those comfortable with vehicle computer systems.

This module is not linked to the vehicle's anti-theft or immobilizer system. A faulty module or one that is unplugged will not prevent the truck from starting, but it will trigger error messages on the dash.

Known Issues and Recalls

NHTSA Recall 26V104000 (Ford Campaign 26C10)

Ford issued a major recall in early 2026 affecting many vehicles, including the 2022-2026 Maverick. The issue involves a software problem where the Integrated Trailer Module (ITRM) can lose communication with the vehicle at startup. This can cause a total loss of trailer brake lights, turn signals, and trailer braking function, increasing the risk of a crash.

• Symptom: A "Trailer Brake Module Fault" message appears on the instrument cluster.
• Remedy: Ford provides a free software update to fix the issue. This can be done by a dealer or through an Over-The-Air (OTA) update sent directly to the vehicle.

Symptoms of a Failing Trailer Brake Control Module

When the TBC module fails, it will almost always display a warning message on the dashboard.

• "Trailer Brake Module Fault": This is the most direct indicator of an internal module problem or the communication loss described in the recall. It can appear even without a trailer connected.
• "Trailer Disconnected" Message: If this message appears intermittently while a known-good trailer is securely connected, it can point to a fault in the module, the vehicle's wiring, or the 7-pin connector.
• "Check Trailer Wiring": This message, along with a short circuit fault, can indicate a problem with the trailer's wiring, but can also be caused by a faulty module.
• No Power to Trailer Brakes: The trailer brakes do not engage at all when the truck's brakes or the manual slide lever are applied.
• Associated OBD-II Codes: A common trouble code associated with a communication failure is U0137 (Lost Communication With Trailer Brake Control Module), which may be logged in the PCM or BCM.

Buying a Used 2025-2026 Maverick Trailer Brake Module

A used OEM module is an excellent, cost-effective alternative to a new part, as it offers the same factory quality and performance once programmed. Here’s what to look for:

• Match the Part Number: The most critical step is to match the OEM part number exactly. The primary number for this generation is SZ6T-19J294-AB. While other Ford modules may look identical, their internal software can be different, leading to compatibility issues. Earlier Maverick models used part numbers like NZ6T-19J294-AD, so ensure you get the correct one for your year.
• Physical Inspection: Carefully inspect the module's casing for cracks or signs of heat damage. Check the electrical connector pins for any corrosion, moisture, or damage. A module with clean pins is essential for a reliable connection.
• Reputable Source: Purchase from a trusted auto recycler that offers a warranty and has a return policy. This protects you in case the part is faulty.
• Why Used OEM is a Smart Choice: For an integrated electronic part like this, a used OEM module is often superior to a new, cheap aftermarket alternative. It's designed specifically for your vehicle's communication network and will function exactly like a new one after programming.

Replacement Overview

The physical replacement of the trailer brake control module is straightforward for a DIYer with basic tools. The main module is located behind the rear seat on the back wall of the cab.

1. Fold down the rear seat to access the back wall.
2. Locate the module. It's a black plastic box mounted to a bracket.
3. To remove it from the bracket, reach behind it and press a release button in the center while sliding the module down.
4. Disconnect the electrical harness.
5. Install the new module by reversing the steps.
6. Crucially, perform the programming/activation step after installation. 🎬 Watch this step-by-step installation and programming guide.

Frequently Asked Questions (FAQ)