# Service bulletin SSM 49650

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10189557
- Published by NHTSA: 2021\-03\-31
- Manufacturer's number: SSM 49650
- Manufacturer's date: 2021\-03\-08
- NHTSA component: EXTERIOR LIGHTING

## NHTSA's summary

Some 2021 F\-150 vehicles equipped with automatic high beam control may experience the fog lamps flashing when the automatic high beam control feature is turned on, the fog lights are turned on and the vehicle is driven in dark conditions. This may be due to the software in the headlamp control module \(HCM\). To correct the condition, reprogram the HCM using the latest level of the appropriate Ford diagnostic scan tool. If the condition persists, refer to Workshop Manual, Section 417\-01 and continue with normal diagnostics. For claiming, use causal part number 13K198 and applicable labor times from Section 10 of the Service Labor Times Standard \(SLTS\) Manual.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189557-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189557-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Lighting

## Vehicles listed

- 2021 FORD F\-150

## Recalls for the same vehicles and component

- [2026342](/recalls/tc/2026342.md), 2026-07-14: Lights And Instruments
- [2026079](/recalls/tc/2026079.md), 2026-02-20: Lights And Instruments
- [26V104000](/recalls/nhtsa/26V104000.md), 2026-02-20: EXTERIOR LIGHTING:TAIL LIGHTS; ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
- [25V348000](/recalls/nhtsa/25V348000.md), 2025-05-23: EXTERIOR LIGHTING:BACK UP LIGHTS
- [2024347](/recalls/tc/2024347.md), 2024-06-14: Lights And Instruments
- [24V443000](/recalls/nhtsa/24V443000.md), 2024-06-14: ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE; EXTERIOR LIGHTING:BACK UP LIGHTS

## Other bulletins for the same vehicles and component

- [ITRM\-26.B04 F\-150](/bulletins/11031913.md), 2026-05-01, Over\-the\-air update: SERVICE BRAKES; EXTERIOR LIGHTING; UNKNOWN OR OTHER; ELECTRICAL SYSTEM. 26C10 Recall remedy \-Addresses instances where the trailer lights and trailer brakes may not function
- [SSM 54008](/bulletins/11020414.md), 2025-07-08, Service bulletin: EXTERIOR LIGHTING. Some 2021\-2025 F\-150 non\-Lightning, 2023\-2025 F\-Super Duty, 2024\-2025 Ranger, and 2025 Explorer vehicles may exhibit a perceived improper functioning fog lamp\(s\). Customers may describe fog lamps blinking, turning on or off, or flashing. If the vehicle is equipped with cornering lamps, this may be normal function. Under certain conditions and inputs, either lamp might turn on or off independently to aid visibility during cornering. This condition does not affect vehicle durability and no additional diagnosis or service is required for this condition at this time. For additional cornering lamp information, refer to the Owner's Manual and/or Workshop Manual \(WSM\), Section 417\-01.
- [OTAPU1009TLCCSM2](/bulletins/10246346.md), 2023-12-07, Service bulletin: EXTERIOR LIGHTING; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:CONTROL MODULE. Software Update PU1009\-TLC\-CSM2 for 2021 F\-150 vehicles is now available. Quality Improvements include: \-improvement to trailer license plate lights illumination. \-improvement to interior motion sensor alarm to prevent inadvertent alarms \-enhancement to prevent alarm activation during inhibit OTA updates
- [TSB 21\-2291](/bulletins/10201617.md), 2021-09-30, Service bulletin: EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; EXTERIOR LIGHTING:TAIL LIGHTS; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Some 2021 F\-150 vehicles equipped with blind spot information system \(BLIS\) and rear lamp assemblies utilizing 2 incandescent bulbs and built on 01\-Jan\-2021 and through 30\-Apr\-2021 may experience a turn signal indicator flashing fast in the instrument panel cluster \(IPC\) with one or more of the rear lamp bulbs not flashing. This may be due to an incandescent rear lamp bulb not being completely inserted or has fallen out of the bulb socket. To correct the condition, follow the Service Procedure to inspect and replace the rear lamp wire harness.

JSON: [/v1/bulletins/10189557](/v1/bulletins/10189557)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20SSM%2049650&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10189557&vehicle=Service%20bulletin%20SSM%2049650)