Description
Socket with bulbs for the right rear lamp exterior CITROEN C4 B7 of the second generation
With a piece of wiring
Part description
This right rear exterior light socket is intended for Citroën C4 II (B7, 2nd generation) cars. A fitted bulb socket is included as well as a wiring piece, making it easy to replace a damaged socket section, corroded contacts or wiring issues. A suitable solution for malfunctions such as the rear light does not light up/fluctuates due to a bad contact in the socket.
Technical information
Product codes
- Product codes: 6351KS
Installation recommendations
Generally/typically for this type of part, replacement of tail light sockets may vary depending on specific equipment and lamp design. Consider the procedure below as a practical, universal guide for replacing a bulb socket.
1) Before assembly (checks of the used part, what to compare with the old part)
- Compare the old and new socket: shape, locks/grips, connector and length/type of wiring included.
- Check the condition of the contacts (they must not be burnt, heated or significantly corroded).
- Verify that the bulbs in the socket are physically undamaged and properly seated.
- Inspect the sealing surfaces and around the base (if there are signs of moisture in the lamp, also address the cause of the leakage).
2) Necessary tools and materials (in general, without specific extra parts)
- Basic set of screwdrivers / bits according to design
- Plastic pry bar for panel removal (depending on access to light)
- A clean cloth, or a gentle cleaner for electrical contacts
- Work gloves
3) Step-by-step assembly procedure
- Turn off the ignition and all light circuits.
- Ensure access to the rear lamp (typically through the luggage compartment/panelling – depending on the car model).
- Disconnect the electrical connector from the old socket (release the connector lock without prying).
- Loosen and remove the old socket from the light (it is usually secured by twists or latches – be careful not to crack the catches).
- Check the inside of the lamp: for signs of overheating, loose parts or moisture.
- Clean the contact surfaces and the connector part (dry, or gently with contact cleaner) and let it air out.
- Insert the new socket into the lamp in the correct position and secure it (by twisting/clamping according to design).
- Connect the connector and check that it clicks into place and that the wiring is not under tension.
- Fix/store the attached piece of wiring so it doesn’t rub against the edges or get in the way of the covers.
- Turn on the lights and gradually verify the function of the individual modes (contour/brake/blinker, etc. depending on the equipment).
- Put back the trim/covers and briefly re-check function after assembly.
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4) Post-assembly checks and test drive/function verification
- Verify that the light shines steadily (no flickering when shaken).
- Check that the lamp does not fog up and that there is no moisture in the socket area.
- After a short drive, check the function of the lights again (vibration often reveals a poorly engaged connector).
5) The most common assembly mistakes + how to avoid them
- Unplugged connector → always check the fuse and pull it lightly to verify that it is secure.
- Bad seating of the base → insert the base in the correct position, do not push with force over the resistance.
- Ignoring corrosion/moisture → if there is moisture in the lamp, solve the cause, otherwise the defect will soon return.
- Pinched wiring → guide the cable so that it does not get under the edges of the covers and is not under tension.
Reasons why the part is damaged
- Overheating of contacts due to higher transition resistance (loose pins, oxidation).
- Corrosion caused by moisture in the lamp or around the connector.
- Mechanical damage to socket locks during disassembly/assembly.
- Vibration and material fatigue – gradual opening of contacts and subsequent blackouts.
- Inappropriate handling of bulbs and their seating (deformation, bad pressure in the socket).
