TSB: FORD F-250 SD, F-350 SD, F-450 SD, F-550 SD (2020)
Bulletin SSM 48777 — April 27, 2020
Bulletin Details
| Bulletin ID | SSM 48777 |
| Manufacturer | FORD |
| Models | F-250 SD, F-350 SD, F-450 SD, F-550 SD |
| Model Years | 2020 |
| Date Issued | April 27, 2020 |
| Date Added to NHTSA | May 4, 2020 |
| Component | EXTERIOR LIGHTING |
| Vehicles Affected | 8 combinations |
What is a TSB?
A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.
If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.
Summary
Some 2020 F-Super Duty vehicles may exhibit a condition where the turn signals flash fast after removal of the factory pick up box and tail lamps for flatbed installation. To prevent the turn signals from flashing fast, the BCM will need to
Affected Vehicles
| Make | Model | Year | Component |
|---|---|---|---|
| FORD | F-250 SD | 2020 | 120000 EXTERIOR LIGHTING |
| FORD | F-250 SD | 2020 | 353000 EQUIPMENT:ELECTRICAL |
| FORD | F-350 SD | 2020 | 120000 EXTERIOR LIGHTING |
| FORD | F-350 SD | 2020 | 353000 EQUIPMENT:ELECTRICAL |
| FORD | F-450 SD | 2020 | 120000 EXTERIOR LIGHTING |
| FORD | F-450 SD | 2020 | 353000 EQUIPMENT:ELECTRICAL |
| FORD | F-550 SD | 2020 | 120000 EXTERIOR LIGHTING |
| FORD | F-550 SD | 2020 | 353000 EQUIPMENT:ELECTRICAL |
Related FORD Recalls
What Should You Do?
If your vehicle is affected by this TSB, contact your authorized FORD dealer. Bring this bulletin ID (SSM 48777) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.
Frequently Asked Questions
A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.
If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.
Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.
This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.