Description
Bulb holder for the rear right and left lamp in the tailgate for CITROËN C4 PICASSO. Comes with a section of wiring.
Reliable replacement bulb socket designed for the tailgate lamps of Citroën C4 Picasso and compatible Grand Picasso models. This socket secures the rear lamp bulbs, provides the electrical contact surface and includes a short length of wiring to simplify installation. Ideal for workshop technicians and DIY enthusiasts searching by part number (e.g. 9653547480, 6351CC, 9653547777, 6350CC), this unit restores stable lighting operation when the original socket shows signs of wear or electrical failure.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model(s): Citroën C4 Picasso, Citroën C4 Grand Picasso
- Product Codes: 9653547480, 6351CC, 9653547777, 6350CC
- Other Numbers: 6351CA, 6351cc, 6350cc
Product Function And Benefits
The bulb holder (socket) provides mechanical support and the electrical contacts for rear tailgate bulbs (brake, indicator, tail lamp). A secure socket ensures consistent contact pressure and correct grounding to avoid flicker or intermittent failure. Supplied with a piece of wiring, this part helps when the original connector or short section of harness is damaged or brittle.
Common Failure Modes
- Corrosion of contact pins due to moisture ingress causing poor electrical connection and intermittent lighting.
- Heat-related deformation or melting from high-wattage bulbs or repeated thermal cycling leading to cracked plastic or loose contacts.
- Broken or frayed wires at the connector caused by repeated opening/closing of the tailgate and vibration.
- Burnt contacts from arcing when contact resistance increases.
Installation Recommendations
- Disconnect the battery before starting work to avoid short circuits and ensure safety.
- Remove the tailgate inner trim to access the lamp assembly. Keep fasteners and clips organised for reassembly.
- Unplug the lamp harness and remove the lamp cluster if required to reach the bulb holder. Note the orientation of the socket before removal (twist-lock or clip style).
- Carefully release the old socket (twist or unclip) and replace with the new unit. Ensure wiring is routed without pinching and that any seals are seated to prevent water ingress.
- Use dielectric grease on contact pins to reduce future corrosion and improve electrical reliability.
- After installation, reconnect the battery and test all rear lamp functions (tail, brake, indicator, reverse if applicable) before reassembling the trim.
- If the harness shows additional damage, repair or replace affected sections and ensure proper grounding.
Why Replace
Symptoms that indicate a failing bulb holder include flickering lamps, lamps that work intermittently, visible corrosion or melted plastic around the socket, or lights that fail only when the tailgate is moved. Replacing the socket and the short wiring piece is a cost-effective repair that restores safe, legal rear lighting and prevents further electrical damage.
