Modern factory headlights do more than light the road. They switch high beam on and off by themselves, steer into corners, level when the truck is loaded, and on some vehicles carve a dark spot out of the high beam around oncoming cars. Every one of those functions lives somewhere specific: some in the vehicle, some in the lamp. When you replace the lamp, what lives in the vehicle keeps working and what lived in the lamp is gone. Knowing which is which is the whole answer to "will my [feature] still work."
If the feature is a signal the vehicle sends to the headlight, it carries over. If the feature is a motor, a sensor, or a per-segment controller inside the headlight, it does not, and no aftermarket assembly can bring it back.
The feature-by-feature answer
| Factory feature | Where it lives | After a RIGNOX headlight |
|---|---|---|
| Automatic headlights (on at dusk) | Vehicle: light sensor and BCM | Works. The vehicle turns the low-beam circuit on; the lamp doesn't know or care why. |
| Auto High Beam (AHB / Auto Beam / IntelliBeam / HBA) | Vehicle: windshield camera, decides high on/off | Works. The camera switches the high-beam circuit; our high-beam group responds to it like any other high-beam command. |
| Daytime running lights | Vehicle sends the DRL signal; lamp provides the DRL | Works, with our DRL. The factory DRL logic (on with engine, dims or off with headlights) drives our light bar instead of the factory one. |
| Turn signals, hazards | Vehicle circuit | Works, as sequential amber. See hyperflash if the rate changes. |
| Fog lights, cornering lights in the bumper | Separate lamps | Unaffected. Not part of the headlight. |
| Headlight washers | Nozzles in the bumper, pump in the vehicle | Usually unaffected. On the few vehicles where the washer jet mounts to the lamp, the product page's Compatibility section says so. |
| Manual leveling dial on the dash | Motor inside the factory lamp | Lost. There is no leveling motor in the aftermarket housing. Aim is set once, mechanically, at install. |
| Automatic leveling (self-leveling with load) | Ride-height sensors in the vehicle plus a motor in the lamp | Lost, and may flag a fault. Some vehicles report a leveling error when the motor is missing. The Compatibility section notes this where it applies. |
| Adaptive / swiveling headlights (AFS, cornering low beam) | Swivel motor inside the factory lamp | Not compatible. No motor in the housing, and on most AFS vehicles the lamp connector and control module differ from the halogen trim's. We do not list our headlights as fitting factory-AFS trims. |
| Adaptive Driving Beam / matrix / "glare-free" high beam (ADB, AHS with segments, Matrix LED, Pixel) | Per-segment drivers inside the factory lamp, controlled by the vehicle's camera and computer | Lost. The function requires individually controlled segments; aftermarket assemblies, ours included, are wired as one low group and one high group. High beam becomes a conventional on/off beam. The vehicle will also report the missing segments as a fault; see below. |
Why AHB survives and ADB doesn't
They sound similar and are often sold under the same "adaptive" label, so this is the distinction that causes the most confusion.
Auto High Beam is a decision, not a beam. The camera watches for headlights and tail lights ahead; when it sees them it switches the whole high beam off, and when the road is clear it switches the whole high beam back on. The headlight's only job is to be on or off. Any headlight can do that, so the function carries over intact.
Adaptive Driving Beam is a beam, not just a decision. Instead of switching the high beam off, the vehicle keeps it on and dims only the segments pointing at the other car. That requires a headlight with many independently driven segments and a data connection to the vehicle's controller that tells each one what to do. Aftermarket headlights have neither: the projectors are grouped, and the lamp has no data link, only power lines for low, high, DRL and turn. So the vehicle sends per-segment commands to a lamp that can't hear them, the high beam behaves as a normal high beam, and the vehicle notices its segments are missing. If your factory lamp says Matrix, Pixel, Adaptive LED, or AHS with a segment count, this is what you are giving up. Our projector-count guide explains why a multi-projector aftermarket lamp doesn't restore it, even if it looks like one that could.
The part we want you to read before you order: ADB vehicles need an extra module
Every RIGNOX headlight has CANbus decoders built in, and on most vehicles that is all that is needed for an error-free install. Vehicles that came with factory ADB or matrix headlights are the exception. The built-in decoder handles the vehicle's bulb-load checks; it does not answer the vehicle's per-segment communication, so an ADB vehicle will report a headlight fault after the swap. Clearing it requires an additional error-canceling module specific to the vehicle, over and above what is in the lamp.
We would rather tell you that now than after the lights are on the truck. If your vehicle had factory ADB or matrix headlights, contact us with your year, model and trim before ordering and we will tell you exactly what the install needs and whether the result is what you want. For most owners of these vehicles the trade is worth it (a sharper, brighter conventional beam plus the look, in exchange for a function they rarely noticed working), but it is your call, and it should be an informed one.
How to find out what your factory headlight has
Owners frequently don't know whether their truck came with adaptive lighting, because the higher-trim features aren't labeled on the lamp. Three quick checks:
- The window sticker or build sheet. Look for "Adaptive Front Lighting," "Adaptive Headlights," "Matrix," "Adaptive High Beam," or "Auto-Leveling." Plain "Auto High Beam" or "High Beam Assist" is the simple version and is fine.
- Turn the wheel with the low beams on, engine running, parked facing a wall. If the beam swings with the wheel, you have AFS.
- Look at the dash while a passenger gets in and out. On an auto-leveling vehicle you can sometimes see the beam settle on the wall as the load changes. A dash leveling dial means manual leveling, which is lost but harmless.
If any of those show adaptive behavior, send us the trim before you order.
The carry-over rule. Auto headlights, auto high beam, DRL logic and turn signals are vehicle-side and carry over. Leveling motors, swivel motors and matrix segments are lamp-side and do not. If your factory lamp was matrix or ADB, budget for an extra module and talk to us first.
The short version
- A feature carries over if the vehicle only needs to send the lamp a signal. It is lost if it needed hardware inside the lamp.
- Auto headlights, Auto High Beam, DRL behavior, turn signals: work.
- Manual/auto leveling motors and swiveling AFS: not present; AFS trims are not listed as compatible.
- ADB / matrix high beam: lost on any aftermarket lamp, and the vehicle will need an extra error-canceling module beyond our built-in decoder. Contact us before ordering.
- Check your build sheet and turn the wheel against a wall to find out what you have.
See what is available for your vehicle in RIGNOX LED headlights by vehicle; each product page's Compatibility section lists the trim exclusions that come from this table.