Ford Expedition Headlight Switch Guide: 2016-2022 Problems and Replacement
If your Expedition's lights are acting strange or turning on by themselves, your dash headlight switch could be the problem.
- For 2018-2022 models, verify if you have the 'lights on when parked' issue; if so, you MUST buy the updated Motorcraft part to fix it per TSB SSM 51321.
- Symptoms like flickering dash lights or inoperative headlights often point directly to this switch, not a more complex wiring problem.
- Replacement is a simple DIY task that usually requires no tools or just a simple trim removal tool and can be done in under 30 minutes.
- Ensure you order the correct switch for your Expedition's options (with or without fog lights).
Is Your Expedition's Headlight Switch Failing?
A bad headlight switch can cause a range of confusing electrical issues. Before you assume you have a wiring nightmare, check for these common signs of a failing switch. Problems can range from a minor annoyance to a serious safety risk.
Common Failure Symptoms:
- Lights Don't Turn On: The most obvious sign is when your headlights or parking lights fail to turn on when you rotate the switch.
- Intermittent Operation: Your headlights or dash lights may flicker, or turn on and off without warning while you are driving.
- Dashboard Lighting Problems: The dimmer function may stop working, or the instrument panel lights might flicker or go out completely.
- Burning Smell: A distinct plastic burning smell coming from the switch area is a critical warning sign that the switch is overheating and failing internally.
- Headlights Turn On By Themselves: For 2018-2022 models, a known issue is the headlights turning on intermittently while the vehicle is parked and turned off. 🎬 See a demonstration of the headlights staying on issue here.
Known Issue for 2018-2022 Ford Expedition
There is a Ford Technical Service Bulletin (TSB SSM 51321) for 2018-2022 Expeditions regarding headlights turning on by themselves when the vehicle is off. This is caused by a flaw in the original switch's internal logic. Replacing it with an old stock part will not fix the issue. You must use the newly designed replacement part from the dealer or a trusted OEM parts supplier to permanently solve this problem.
Choosing the Right Aftermarket Headlight Switch
When replacing the headlight switch, you have a choice between OEM (Original Equipment Manufacturer) and aftermarket brands. Here’s how to decide.
Brand Tiers for Your Expedition
- Tier 1: Motorcraft (OEM)
Motorcraft is Ford's official parts brand. For the 2018-2022 models affected by TSB 51321, using a new Motorcraft switch is strongly recommended to ensure you get the updated, corrected part. For any year, Motorcraft guarantees a perfect fit and correct electronic communication with the BCM. While it costs more, it's the safest choice for this electronic component. - Tier 2: Standard Ignition (SMP)
Standard Ignition is a respected aftermarket manufacturer that produces reliable electronic parts. For a 2016-2017 Expedition without the specific TSB issue, a Standard switch is a dependable, cost-effective alternative to OEM. It provides good quality and function for a lower price. For 2018-2022 models, it is less certain if their design incorporates the fix for the TSB, making Motorcraft a safer bet.
Headlight Switch Replacement Cost
The cost to replace the headlight switch depends on the part you choose and whether you do the job yourself. The replacement is simple enough for most DIY mechanics.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Motorcraft) Part | $110 - $160 |
| New Aftermarket Part | $57 - $81 |
| Shop Labor | $58 - $85 |
| Total Professional Replacement | $168 - $245 |
Frequently Asked Questions (FAQ)
Can I drive my Expedition with a bad headlight switch?
You can, but it is not recommended and may be illegal. If your headlights do not work, you cannot safely or legally drive at night or in poor visibility conditions. If the switch is causing intermittent issues, it could fail completely at any time, creating a serious safety hazard.
Is replacing the headlight switch a DIY job?
Yes, for most people with basic tools. The headlight switch is typically held in by clips and can be carefully pried out of the dashboard. After disconnecting the electrical connector and plugging in the new switch, it simply pops back into place. The job usually takes less than 30 minutes.
🎬 Watch: This F-150 walkthrough shows the similar switch replacement process.Why are my dash lights flickering? Is it the headlight switch?
It very likely could be. The headlight switch assembly often contains the dimmer control for the instrument panel. A failing internal rheostat (the part that controls brightness) can cause the dash lights to flicker or stop working altogether.
Are there any recalls on the 2016-2022 Expedition headlight switch?
No, there are no active safety recalls for the headlight switch itself on this generation of Expedition. However, there is a Technical Service Bulletin (TSB) for 2018-2022 models for headlights turning on while the vehicle is off, which requires a revised part to fix.
Helpful Videos
Technical Specifications
OEM Part Numbers: DG9Z-11654-BA
Dash-mounted rotary dial switch. Controls headlights, parking lights, and often fog lights and instrument panel dimming.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ford Expedition:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Expedition's Headlight Switch Failing?
- Common Failure Symptoms:
- Known Issue for 2018-2022 Ford Expedition
- Choosing the Right Aftermarket Headlight Switch
- Brand Tiers for Your Expedition
- Headlight Switch Replacement Cost
- Frequently Asked Questions (FAQ)
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