Description
Wiring harness with socket for rear upper light CITROËN C5 I and II Estate
Functionality of the bulb itself is not guaranteed
Product Overview
Used wiring harness with bulb holder for the rear upper tail light on Citroën C5 I and II Estate (Kombi). This harness provides the electrical connection for the stop/taillight and related lamp functions. Often searched by part number 6534KA, it is a practical replacement for workshops and DIY enthusiasts repairing rear lighting assemblies.
Features And Function
The harness contains the socket and wiring that delivers power and ground to the rear upper lamp. It ensures correct contact between the bulb and vehicle electrical system, transmits brake and tail signals, and maintains the integrity of the circuit when fitted correctly. The socket can wear, corrode, or lose contact over time, which may cause intermittent lighting or failure of the lamp circuit.
How To Replace On The Vehicle
Replacement is straightforward for a trained mechanic or experienced DIYer with basic tools:
- Disconnect the vehicle battery before starting to avoid short circuits.
- Remove interior trim panels or tailgate lining to access the rear lamp assembly.
- Unplug the main lamp connector and remove the lamp unit if necessary to reach the socket.
- Extract the old socket from the lamp holder and disconnect any wiring retaining clips.
- Install the new socket/harness, secure wiring with original clips, reconnect the lamp connector and refit trim.
- Reconnect the battery and test all lamp functions (tail, brake, indicator/reverse as applicable).
Installation Recommendations
- Always disconnect the battery before removal/installation.
- Check connector pins for corrosion or damage and clean with electrical contact cleaner if required.
- Use dielectric grease on contacts to slow future corrosion and improve long-term reliability.
- Ensure bulbs fitted are of the correct type and wattage to avoid overheating or socket damage.
- Secure wiring away from sharp edges and hinge points to prevent chafing when the tailgate opens and closes.
Why This Part Fails Most Often
Common failure causes include moisture ingress and corrosion of contacts, mechanical wear from frequent tailgate movement, brittle insulation due to age and UV exposure, and thermal damage from incorrect bulbs or poor contacts. Environmental exposure (road salt, water) accelerates degradation. Failures are typically gradual—intermittent contact or dimming—or sudden if wires break at a flex point.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C5 I & II Estate (Kombi)
- Product Codes: 6534KA
- Additional Numbers: NFP
Notes For Professionals
This part is suitable for workshop fitment and for experienced DIY repairs. Verify fitment visually against the vehicle’s existing socket and routing before installation. If wiring damage extends beyond the socket, repair or replacement of the full loom section may be required.
