# Service bulletin SSM 51617

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: 10236332
- Published by NHTSA: 2023\-05\-16
- Manufacturer's number: SSM 51617
- Manufacturer's date: 2023\-05\-09
- NHTSA component: EXTERIOR LIGHTING

## NHTSA's summary

Some 2018\-2022 Expedition vehicles may exhibit a condition of intermittent headlamp operation while the vehicle is OFF and have diagnostic trouble code \(DTC\) B1533 stored in the body control module \(BCM\). This may be due to the internal logic within the headlamp switch. To correct this condition, replace the headlamp switch \(service base part number: 11654\). Refer to Workshop Manual, Section 417\-01.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10236332-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10236332-9999.pdf)

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

## Components

Lighting

## Trouble codes named

B1533

## Vehicles listed

- 2018 to 2022 FORD EXPEDITION

## Recalls for the same vehicles and component

- [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

## Other bulletins for the same vehicles and component

- [ITRM\-26.B04 Expedition](/bulletins/11033811.md), 2026-06-13, Over\-the\-air update: ELECTRICAL SYSTEM; EXTERIOR LIGHTING; SERVICE BRAKES. 26C10 Recall remedy \-Addresses instances where the trailer lights and trailer brakes may not function
- [SSM 51321](/bulletins/10230964.md), 2023-02-02, Service bulletin: EQUIPMENT:ELECTRICAL; EXTERIOR LIGHTING:HEADLIGHTS. Some 2018\-2022 Expedition vehicles may exhibit a condition of intermittent headlamp operation while the vehicle is OFF and have diagnostic trouble code \(DTC\) B1533 stored in the body control module \(BCM\). This may be due to the internal logic within the headlamp switch. Switch and/or module replacement will not resolve this condition. Headlamp operation is not affected while the vehicle is ON. A new headlamp switch is currently under development to correct this condition. Let the customer know they can continue to drive the vehicle and schedule a follow\-up appointment in May 2023, when parts are expected to become available. Follow up with the customer to confirm the appointment once OASIS is updated with the repair information.
- [SSM 50347](/bulletins/10205483.md), 2021-12-26, Service bulletin: EXTERIOR LIGHTING. Some 20182021 Expedition/Navigator vehicles may exhibit inoperative reverse lamps with DTC B1277 stored in the body control module \(BCM\). The vehicle may also exhibit the auto dimming rear view mirror becoming dark as soon as the key is turned on or is inoperative. This may be due to incorrect wiring of an aftermarket 5 pin jumper connector from a non\-Ford windshield supplier that is causing a short to ground. To correct this condition, inspect if the windshield was recently replaced and verify the circuits in the 5 pin jumper connector located between connector C9440 and C9224 are routed in the correct pin location and adjust as necessary. Refer to the Wiring Diagram, Cell 124\-10.

JSON: [/v1/bulletins/10236332](/v1/bulletins/10236332)

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