Description
Headlight Level Adjustment Switch CITROEN PEUGEOT. It is from a Peugeot 406.
This headlight level adjustment switch is intended for vehicles from the Stellantis group and is typically used on Peugeot 406 models. The switch controls manual adjustment of the headlamp beam angle to compensate for changes in vehicle load and luggage, ensuring correct beam height for safe night driving. Many customers search for this part by its product code 6552YN, so the code is included in the technical data below.
Technical Information
- Manufacturer: Citroën / Peugeot (Stellantis)
- Model: Peugeot 406
- Product Codes: 6552YN
- Other Numbers: N/A
Function And Benefits
The switch allows the driver to adjust the vertical aim of the headlights from the dashboard. Proper adjustment prevents dazzling oncoming traffic, improves visibility, and helps maintain compliance with road regulations. For workshops and DIY mechanics, replacing a faulty switch restores reliable manual control of headlamp leveling.
Installation Recommendations
- Always disconnect the battery before starting work to avoid short circuits and protect vehicle electronics.
- Remove the dash trim panel or lower fascia around the switch location. Depending on the trim, this may require removal of clips or screws; keep fasteners for reassembly.
- Unscrew or unclip the old switch, gently pull it from the dash and unplug the electrical connector.
- Connect the new switch, verify the connector is fully seated, and secure the switch in the dash. Refit trim and fasteners.
- Reconnect the battery and test the switch operation: check that the headlight beam moves smoothly through its adjustment range and that both sides respond correctly.
- If illumination or electrical faults remain after replacement, inspect wiring harness and ground connections for corrosion or damage.
Why This Part Most Commonly Fails
- Wear Of Internal Contacts: Frequent use causes contact wear in the potentiometer or switch mechanism, leading to intermittent or no adjustment.
- Corrosion And Moisture Ingress: Moisture can corrode electrical contacts or cause the switch to seize, especially in older vehicles or those exposed to humid conditions.
- Mechanical Damage: Aggressive removal of trim or impact to the dash can break the switch housing or mounting tabs.
- Wiring Issues: Broken wires, poor grounds or connector corrosion can mimic a failed switch even when the switch mechanism is intact.
Notes For Mechanics And DIY Enthusiasts
This switch is a straightforward replacement for experienced technicians and competent DIYers. Keep a small set of trim tools, a torque-appropriate screwdriver, and contact cleaner handy when replacing the unit. After installation, verify beam alignment visually and, if available, use headlamp aiming equipment to confirm proper alignment for safety and compliance.
