Description
Wiring for the left and right rear lamp for Citroën C4 5-door first series. Functionality of the bulbs themselves is not guaranteed.
This rear lamp wiring harness is intended for mechanics and DIY enthusiasts who need a direct replacement for damaged or corroded tail-light connections on the Citroën C4 (five-door, first series). The harness routes power and signal to the rear combination lamp assemblies (tail, brake, indicator, reverse and rear fog where applicable) and provides the factory-style connectors for a straightforward swap. Common search terms include rear lamp wiring harness, tail light wiring loom, Citroën C4 wiring harness and the product codes 6350T8, 6351T8, 6534PC.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4 I, 5-Door, First Series
- Product Codes: 6534PC
- Additional Numbers: 6350T8, 6351T8
Function And Application
The harness supplies electrical power and signal paths to the left and right rear light clusters. It contains individual circuits for tail lights, brake lights, indicators, reverse lights and rear fog where fitted. It is designed to mate with the original lamp connectors and the vehicle wiring loom to restore reliable lighting operation after connector damage or wiring failure.
Replacement Procedure
Replacement is typically performed as follows:
- Disconnect the negative battery terminal before starting any electrical work.
- Open the tailgate/boot and remove the trim panels to access the rear lamp mounting screws or clips.
- Remove the rear light cluster from the body to expose the lamp connector and harness routing.
- Unplug the old harness from the lamp and vehicle body connectors, taking note of routing and securing points (clips, grommets).
- Fit the new harness following the original routing, secure with clips and replace any grommets to prevent water ingress.
- Reconnect connectors, refit the lamp assembly and trim panels, then reconnect the battery and test all lamp functions (tail, brake, indicator, reverse, fog).
Installation Recommendations
- Always Disconnect The Battery Before Work To Avoid Short Circuits Or Damage.
- Use Dielectric Grease On Connectors In High-Moisture Areas To Reduce Corrosion.
- Inspect Connector Pins For Corrosion Or Bent Contacts And Clean Or Replace As Necessary.
- Ensure Proper Routing To Avoid Pinching Between Body Panels; Secure With Clips Or Cable Ties At Factory Attachment Points.
- After Installation, Verify All Light Functions From Both Sides And Check For Warning Messages On The Instrument Cluster.
Most Common Failure Causes
Rear lamp harnesses typically fail due to connector corrosion from moisture ingress, mechanical damage (impact or trunk loading), rodent chewing, or flex fatigue at fixed routing points. Poor repair history or improper sealing around grommets accelerates deterioration. Environmental exposure (road salt, humidity) increases the risk of oxidation and short circuits.
Durability And What To Expect
Service life depends on operating conditions; in dry, temperate environments a harness can last many years, while in coastal or salted-road regions signs of failure often appear earlier. Regular inspection during bodywork or lamp replacement helps detect problems before an electrical fault occurs.
Notes For Buyers
This harness is supplied as a replacement electrical lead for the left and right rear lamps on Citroën C4 five-door first series models. The item is offered without guaranteed functionality of bulbs, so bulbs and lamp units should be verified separately if required. Search by product codes (6350T8, 6351T8, 6534PC) for faster identification.
