Description
Wiring harness for the rear lamp, left and right, for Citroën C4 5-door, first series. Functionality of the bulbs themselves is not guaranteed.
Product Overview
This rear lamp wiring harness is intended for the left and right tail light assemblies of the Citroën C4 5-door (first series). It is a direct-fit harness intended to restore electrical connection to rear lamps and associated functions (brake light, tail light, indicator, reverse light). The part is often searched by product numbers 6350T8, 6351T8 and 6534PC—include these codes when searching to speed up finding the correct unit.
Who Should Buy
Recommended for professional auto mechanics and experienced DIY enthusiasts repairing Citroën C4 (5-door) vehicles. Ideal when symptoms point to wiring damage, intermittent lamp operation or after a rear collision where lamp wiring may be stretched or torn.
Installation Guide
Basic replacement steps (general guidance):
- Disconnect the negative battery terminal before starting to avoid short circuits and accidental damage to vehicle electronics.
- Remove interior trunk trim and access panels to reach the tail lamp mounting points and wiring route.
- Unscrew and remove the rear light cluster(s) to expose connectors and the existing harness.
- Unplug the lamp connectors and detach the old harness from clips and retainers along the body.
- Route the new harness along the original path, securing it with clips and fasteners; avoid sharp edges and moving parts.
- Reconnect lamp connectors, reinstall the lamp cluster and trim, then reconnect the battery and test all rear light functions (tail, brake, indicator, reverse, fog where applicable).
For a durable installation use dielectric grease on connector pins to reduce corrosion, replace any damaged clips or grommets, and ensure good ground connections.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 5-Door (First Series)
- Product Codes: 6350T8, 6351T8, 6534PC
- Other Numbers: Not Available
Common Failure Causes
Rear lamp wiring harnesses typically fail due to:
- Corrosion at connectors caused by water ingress or damaged grommets.
- Mechanical damage from accidents, trunk loading or sharp edges causing chafing and broken conductors.
- Connector overheating from poor contact or high-resistance joints, leading to melted housings or intermittent signals.
- Age-related insulation cracking and brittle wires, especially in vehicles exposed to road salt and harsh climates.
Why Replace This Part
A faulty rear lamp harness can cause one or more rear lights to stop working or function intermittently, which is a safety and legal issue. Replacing the harness restores reliable electrical continuity and eliminates hard-to-trace intermittent faults caused by damaged wiring or loose connectors.
Recommendations For A Reliable Repair
- Inspect lamp bulbs and fuses during replacement (note: bulbs are not guaranteed with this harness).
- Replace damaged grommets and ensure the harness is protected where it passes through metal panels.
- Secure the harness with original-style clips; avoid routing near hot exhaust components or moving parts.
- Test all lamp functions after installation and verify proper indicator and brake light operation with a second person or diagnostic tool.
