NHTSA ID Number: 10236029
Manufacturer Communication Number: SSM 51601
Summary
Some 2021-2023 F-150 and 2022-2023 F-Super Duty/Expedition/Navigator/Maverick vehicles equipped with an integrated trailer module (iTRM) may exhibit a trailer lamp fault message with various related diagnostic trouble codes (DTC). Most trailer emulator testers will not draw enough current to correctly diagnose these concerns. They may be used to diagnose basic functionality of the iTRM, however, some trailer emulator testers may cause false trailer lamp fault messages to appear. The customer’s trailer should be used for diagnosis instead of a trailer emulator tester. Refer to Workshop Manual (WSM), Section 417-01 for normal diagnostics.
22 Affected Products
Vehicles
| MAKE | MODEL | YEAR |
FORD | EXPEDITION | 2022-2023 |
| FORD | F-150 | 2021-2023 |
| FORD | F-250 SD | 2022-2023 |
| FORD | F-350 SD | 2022-2023 |
| FORD | F-450 SD | 2022-2023 |
| FORD | F-550 SD | 2022-2023 |
| FORD | F-600 SD | 2022 |
| FORD | F-650 SD | 2022-2023 |
| FORD | F-750 SD | 2022-2023 |
| FORD | MAVERICK | 2022-2023 |
| LINCOLN | NAVIGATOR | 2022-2023 |
1 Associated Document
Manufacturer Communications
SSM 51601
2022-2023 Expedition (U553) (B8)
2021-2023 F-150 (P702) (FD)
2022 F-Super Duty (P558) NA (FE)
2023 F-Super Duty (P708) (FH)
2022-2023 Maverick (P758N) (FE)
2022-2023 Navigator (U554) (B9
2021-2023 – Various Vehicles – Trailer Lamp Fault With Various DTCs
SaleBestseller No. 1
Trailer Light Tester Box with 12V 12Ah Battery,Remote Control Function with 98 FT Range, 7-Way Flat (Spade) Pin,6-Way Round Pin,4/5-Pin Connectors,IPX8 Waterproof Case,2-Year Warrnaty
- Widely Compatible:Trailer light tester Box with 12V 12Ah Battery,Can test trailers directly,Including 3 types of test connectors,for 7- Way Flat (Spade) Pin,6-Way Round Pin,4/5-Pin Connectors,Perfectly compatible with standard U.S.trailer plugs
- Upgraded Remote Control:AirVows Trailer Light Tester Box now features remote control—simply flip the default Local Control switch to Remote Control to activate,98 ft Max remote range.Troubleshoot trailer faults right from your stool with a simple remote
- Ensure Testing Security:Use our 12V battery,the tester includes short-circuit and overload protection to prevent damage and ensure safe operation.Its waterproof housing means you don’t have to worry if you get caught in the rain while testing
- Accessories:12V 12Ah Battery,500mA power cord,adapter,trailer box,remote control(without battery)
- Complete Testing System:The trailer light tester can check electric brakes and all trailer lighting functions.Reliable for shop or field use,it tests turn signals,brake lights,tail lights,and reverse lights—accurately verifying wiring to ensure your trailer’s electrical system is safe and dependable
Bestseller No. 2
Oyviny 7 Pin Trailer Plug Tester & 4 Pin Trailer Tester with Double-Sided LED Indicators, Trailer Light Tester for Boat Trailer RV Truck Camper, Not Suitable for Vehicle with Lamp Out Sensor
- 2 in 1 Design: This trailer wiring tester combines both 4 pin flat and rv blade 7 pin trailer light tester, allows you to test both the 4 and 7 pin trailer connectors; Note: This trailer tester does NOT work with vehicle has a lamp-out sensor
- Upgraded Double-Sided LED Indicators: 4pin & 7 pin trailer circuit tester designed with LEDs on both sides, Unlike the other testers only have one side leds, which make it hard to read; A great tool to help troubleshoot issues or verify you have install or fixed your trailer plug correctly
- 6 Light Functions: Versatile trailer connector tester can be used to test 6 separate trailer light functions, quickly confirm the functionality of taillights, brake lights, reverse lights, turn signals, electric trailer brakes and 12V auxiliary power on your vehicle
- Bright LED Indicators: Trailer hitch tester equips a LED light for each electrical function; Plugging the light tester and check, you can easily read the green LEDs and find out which wiring has a problem
- Durable Construction: For long-lasting use, this 7 blade RV trailer tester is made from durable ABS plastic, which will never rust or corrode, Tin-Plated copper terminals makes great conductivity
SaleBestseller No. 3
![True Mods 4-Way Flat Trailer Wiring Tester [Nickel-Plated Copper Terminals] [Male & Female] [Continuity Test] 4-Pin Trailer Light Wire Circuit Tester](https://m.media-amazon.com/images/I/41dMoqBZAdL._SL160_.jpg "Trailer Lamp Fault With Various DTCs - 2021-2023 Ford & Lincoln 4")
True Mods 4-Way Flat Trailer Wiring Tester [Nickel-Plated Copper Terminals] [Male & Female] [Continuity Test] 4-Pin Trailer Light Wire Circuit Tester
- STRAIGHTFORWARD TRAILER LIGHT TESTING - Simply plug the tester inline between the tow vehicle and trailer, turn on the lights and check the easy to read LEDs.
- ISOLATE PROBLEMS QUICKLY- By effectively splitting the trailer wiring harness in half, problems can be quickly traced to the tow vehicle side or the trailer side wiring.
- NO TOOLS NEEDED - Plug-n-play design means you don't need anything else to effectively test your trailer light harness.
- LONG LASTING CONSTRUCTION - Designed to be weather, corrosion, and impact resistant for years of reliable service.
- CONVENIENT COMPACT DESIGN -The two-sided design means you can leave it plugged in or store it conveniently in your glove box, door pocket, or tool box.
SaleBestseller No. 4
Trailer Light & Electric Brake Tester with 12V 10Ah Battery, Tests 7-Spade, 6-Round and 4/5-Flat Pin Type Trailer Harnesses, Upgrade Wireless Remote Control, IP68 Waterproof Case
- Wireless Remote Control Operation: The Zuomeng trailer tester box with battery is equipped with a wireless remote control, allowing you to operate the tester remotely, eliminating the need for running back and forth or working with multiple people, saving time, improving work efficiency, and easily completing testing.
- Wide Compatibility: The trailer light tester box is compatible with various 7-way flat (spade) connectors and comes with 6-way round pin and 4/5-pin connectors, easily meeting the testing needs of various types of trailers.
- Safe and Convenient: Equipped with short-circuit protection and overload protection functions, effectively preventing equipment damage and ensuring safe use. At the same time, it has a built-in 12V 10Ah lithium iron phosphate rechargeable battery, which can be used in remote areas without an external power source.
- Comprehensive Electrical System Testing: The trailer light tester can test electric brakes as well as all trailer lighting functions, including turn signals, brake lights, tail lights, and reverse lights, accurately verifying wiring settings to ensure the safety and reliability of the trailer’s electrical system.
- Sturdy and Durable: Features metal socket construction for enhanced durability, along with a sturdy waterproof carrying case design that is sun-proof, drop-resistant, high-temperature-resistant, and shock-resistant, capable of withstanding harsh working conditions.
Bestseller No. 5
WUSHIXAN Trailer Light Tester, 7 Pin Trailer Plug Testerwith Red LED, 7 Way Trailer Plug Testerfor Diagnosing and Fixing Trailer Socket Circuit Problems
- 【HIGH QUALITY】Trailer Tester is Made of High-quality ABS Plastic and Copper, with a Black Matte Exterior Shell for Optimal Weather, Corrosion and Impact Resistance for Long-term Use.
- 【MULTI-FUNCTION】7 Pin Trailer Tester can Test Tail Lights, Brake Lights, Reverse Lights, Turn Signals, Brakes and Auxiliary Power.
- 【COMPATIBILITY】Trailer Wiring Tester is Compatible with Standard 7-way Blade Trailer Outlets. 7 Pin Trailer Plug Size: 5.2x2.96x1.63 Inches (13x7.5x4.1CM).
- 【SUPERIOR CONDUCTIVITY】 7 Way Trailer Plug Uses High Quality Brass Pins to Ensure a Safe and Stable Electrical Signal Connection between the Plug and the Trailer. The Trailer Light Adapter Features 6 Bright LED Indicators. Each Indicator is Clearly and Distinctly Labeled, Allowing you to Quickly Identify Working and Faulty Circuits at a Glance.
- 【EASY TO USE】 Plug 7 Prong Trailer Plug into the Trailer or Adapter, Turn on the Lights, and Check the Easy-to-read LEDs, Plug and Play.
Last update on 2026-06-18 / Affiliate links / Images from Amazon Product Advertising API
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