Ford & Lincoln Multi-Contour Seat Failure (2013-2021): Why It's Probably Not the Module

The Real Reason Your Massaging Seat Stopped Working

If the multi-contour massaging seat in your Ford or Lincoln has stopped working, you might assume the expensive control module under the seat has failed. However, the most common cause is actually a poor electrical connection. Ford identified this issue and released Technical Service Bulletin (TSB) 19-2390 (which superseded TSB 19-2293) for a wide range of vehicles.

The TSB explains that the problem is 'terminal fretting' at the electrical connector for the seat module. This means tiny vibrations and oxidation over time cause the metal pins in the connector to lose their solid connection, leading to a loss of communication and power. The module itself is often perfectly fine, but it can't function without proper signals and electricity.

Common Symptoms of Failure

When the seat module connector begins to fail, you will likely experience one or more of the following symptoms:

• The massage and lumbar adjustment features are completely inoperative or work only intermittently.
• The seat massage and adjustment options are 'greyed out' and cannot be selected on the SYNC infotainment screen.
• The physical adjustment switch on the side of the seat does not respond.
• The check engine light or a specific warning message may appear on the dashboard.
• Scanning the vehicle's computer may reveal Diagnostic Trouble Codes (DTCs) such as U024B (Lost Communication With Seat Control Module G), U024C (Lost Communication With Seat Control Module H), or B1471 (Seat Back Motor Stalled).

Is This a Safety Recall?

No, the failure of the multi-contour massage function is not a safety recall. It is a functional issue addressed by a Technical Service Bulletin. However, it's important not to confuse this with several other seat-related recalls that do affect these vehicles:

• NHTSA Recall 16S05: On certain 2016 Ford F-150 trucks, activating the passenger seat massage function could confuse the Occupant Classification System, causing it to misclassify an adult as a child and disable the airbag in a crash. The fix was a software update.
• NHTSA Recall 18S37: Some 2018 Ford Expedition and Lincoln Navigator SUVs were recalled for missing reinforcement brackets in the second-row seat assembly, which could compromise occupant safety in a crash.
• NHTSA Recall 25S31: A recall was issued for 2018-2020 Ford Expedition and Lincoln Navigator models due to a faulty seat belt pretensioner that could lock the belt or fail to restrain an occupant properly.

These recalls are separate from the massage function failure. Your massage seat not working is a comfort and convenience issue, not a direct safety defect addressed by a recall.

How to Diagnose the Problem

Before spending money on parts, follow these steps to confirm the cause of the failure.

1. Check the Fuses: The first and easiest step is to check the fuse for the seat module. On a 2015-2017 F-150, for example, the relevant fuse is often in the under-hood fuse box. Consult your owner's manual for the specific fuse location for your vehicle.
2. Scan for Codes: Use a capable OBD-II scanner to check for the specific DTCs mentioned earlier (U024B, U024C, B1471). These codes point directly to a communication or module problem.
3. Inspect the Connector: Raise the passenger seat to its highest position to get a better view underneath. Locate the main electrical connector going into the seat module. Check for any obvious signs of damage, melting, or corrosion.
4. Inspect for Chafed Wires: In some cases, wires inside the seat backrest can rub against the metal seat frame, wearing through the insulation and causing a short. This may require unzipping the seat back cover 🎬 See how to access and repair internal seat wiring issues. to inspect the wiring harness that runs to the air pump.
5. Check Air Hoses: A less common issue is a disconnected air hose. If you can hear the pump motor running inside the seat but feel no massage or lumbar movement, an air tube may have simply popped off its connector.
🎬 Watch this guide to fixing air hoses and deflation problems.

The Permanent Fix: TSB 19-2390 Repair

The official and most reliable repair is to replace the faulty connector with an updated pigtail kit, part number KU2Z-14S411-FA. This is a job that requires some skill but can be done by an experienced DIYer.

If you are not comfortable with soldering multiple wires in a confined space, it is best to have a trusted mechanic or the dealership perform this TSB.

Buying a Used Seat Motor Module

If you have performed the TSB wiring repair and confirmed the module itself is faulty, a used OEM module is a cost-effective alternative to a new one, especially since aftermarket versions for this specific multi-contour function are not readily available. Here’s what to look for:

• Verify Part Numbers: Match the part number from your original module to the used one. There are many variations; common ones include FU5Z-14F549-H and DU5T-14F549-BJ. Ensure you are buying the correct module for the passenger (Right) side.
• Inspect the Pins: Ask the seller for a clear photo of the electrical connector pins on the module. Look for any signs of discoloration, corrosion, or heat damage. Avoid any module that shows signs of the same terminal fretting issue you are trying to fix.
• Get the Pigtail: If possible, ask the recycler to include the vehicle-side connector pigtail, cut with a few inches of wire. This can be invaluable if your original connector is damaged beyond repair.
• Consider Mileage: While these modules are not high-wear items, one from a lower-mileage vehicle is always preferable. The internal air pump does have a finite life.

Cost of Replacement

The cost can vary dramatically depending on whether you need the full module or just the wiring repair.

Replacement Overview & Programming

• Difficulty: 3 out of 5 (for pigtail repair); 2 out of 5 (for module swap).
• Time: 1.5-2.0 hours per seat for the pigtail repair.
• Tools: Socket set, trim removal tools, wire strippers, soldering iron, heat gun.
• Programming: If you are only repairing the wiring to your original module, no programming is needed. You will simply need to clear any stored DTCs. If you are replacing the module with a new or used unit, programming may be required using a dealer-level scan tool or a tool like FORScan to ensure all functions communicate correctly with the vehicle.

Frequently Asked Questions (FAQ)