Description
Headlight Tilt Adjustment Switch Citroën Peugeot. It is from Peugeot 406.
Professional replacement headlight leveling switch for Citroën and Peugeot vehicles, delivered as a practical solution for garages and DIY mechanics. This unit, referenced under part number 6552YN, restores manual headlight vertical adjustment when the original control becomes intermittent, stuck, or physically damaged. Ideal for workshops servicing Peugeot 406 vehicles and for owners looking for a direct-fit replacement control. Listing the part number 6552YN prominently helps technicians and buyers find the correct component quickly.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Peugeot 406
- Product Codes: 6552YN
- Other Numbers: NFP
Function And Application
The switch controls the headlight vertical adjustment mechanism, sending an electrical signal to the leveling motor/actuator to raise or lower the beam according to vehicle load or driver input. This is a common manual leveling control used on Peugeot 406 and compatible Stellantis models. Replacing a faulty switch will recover precise headlight alignment and improve night driving safety.
Replacement Procedure
- Preparation: Park on a level surface and set the parking brake. Always disconnect the battery before starting work to avoid short circuits and to protect vehicle electronics.
- Access: Remove the dashboard trim or switch bezel around the headlight control using plastic trim tools to avoid damage to the dash finish.
- Removal: Unscrew or unclip the switch from its mounting. Carefully unplug the electrical connector—note any locking tabs.
- Installation: Connect the new switch, secure it in place, and reassemble trim. Reconnect the battery and test the adjustment function, checking travel and responsiveness of the headlight actuator.
- Tools Recommended: Trim removal tools, small screwdriver set, basic socket set, multimeter for quick electrical checks.
- Time Estimate: Typically 15–45 minutes depending on dashboard access and vehicle variant.
Installation Recommendations
- Disconnect the battery before removal to protect vehicle electronics and avoid accidental short circuits.
- Use non-marring trim tools to prevent damage to interior panels and retainers.
- Inspect connector pins and wiring for corrosion or damage; clean contacts if necessary before fitting the new switch.
- After fitting, verify full range of adjustment and ensure headlights are properly aligned on a flat surface.
Why This Part Most Often Fails
- Wear Of Internal Contacts: Frequent use causes contact wear or loss of continuity, leading to intermittent or complete failure.
- Mechanical Damage: Knobs and levers can break due to rough handling or impact to the dashboard area.
- Moisture And Corrosion: Ingress of moisture can corrode terminals and moving parts, especially in older vehicles or those exposed to humid environments.
- Electrical Faults: Short circuits, voltage spikes, or wiring faults can damage the switch electronics.
- Dash Impact Or Accident Damage: Front-end impacts or interior damage can affect switch mounting and operation.
Troubleshooting Tips For Mechanics
- If the switch is intermittent, check connector continuity with a multimeter before replacing.
- Test the leveling motor independently to ensure the issue is not in the actuator or wiring harness.
- Inspect surrounding fuses and relays if the switch has no power—sometimes a blown fuse is the root cause.
Part number 6552YN is the quickest reference for finding the correct replacement. This headlight tilt adjustment switch is a practical, serviceable item that returns reliable headlight control when replaced correctly.
