Description
Wiring harness for the rear light, left and right side, for Citroën C8 vehicles. Functionality of the bulbs themselves is not guaranteed.
This rear lamp wiring harness (part number 6534KJ) supplies power and signal connections to the left and right rear light clusters on Citroën C8 vehicles. Suitable for mechanics and experienced DIYers, the harness replaces damaged or corroded cabling that causes intermittent lights, faults on the rear lamp functions or complete lamp failure. The part is commonly searched for by its product code 6534KJ.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C8, Peugeot 807
- Product Codes: 6534KJ
- Other Numbers: Not listed
Function
The wiring harness routes power and control signals from the vehicle loom to the rear lamp assemblies. It includes connector plugs, earth/ground wiring and the splices required for brake lights, tail lights, indicators, reverse lights and rear fog lights. A damaged harness will cause intermittent operation, blown fuses or complete loss of one or more rear light functions.
How To Replace
- Disconnect the negative battery terminal before starting work to avoid short circuits.
- Open the tailgate and remove interior trim panels to access the rear lamp assemblies.
- Remove the tail lamp clusters (usually fixed with screws/clips) to reach the lamp connectors and harness routing.
- Unplug the lamp connectors and release any retaining clips or cable ties securing the old harness.
- Disconnect any grommets where the harness passes through the body and remove the old harness from the vehicle.
- Route the replacement harness in the same path, secure with clips and ties, and refit grommets to maintain water sealing.
- Reconnect all lamp connectors, restore the battery, and test all rear lamp functions (brake, tail, indicator, reverse, fog).
- Apply dielectric grease to connectors if necessary and ensure a solid ground connection to avoid intermittent faults.
Installation Recommendations
- Work on a dry vehicle and inspect grommets and seals — replace seals showing wear to prevent future water ingress.
- Check connector pins for corrosion or bent contacts and clean or replace connectors if required.
- Secure the harness with original-style clips where possible to avoid chafing against bodywork.
- After installation, verify all light functions and scan for any stored fault codes related to the lighting circuits.
Why The Part Most Frequently Fails
Common causes of failure are water ingress and corrosion at connectors, deteriorated insulation from age and heat, mechanical damage from vibration or incorrect routing, and rodent damage in some cases. Corroded contacts and poor grounding lead to intermittent operation or increased resistance that can cause blown bulbs and electrical faults.
Signs You Need To Replace The Harness
- Intermittent or non-functioning brake, tail, indicator, reverse or fog lights.
- Visible damage, melted insulation, or green/white corrosion on connector pins.
- Blown fuses that reoccur after replacement, indicating a short or high resistance in the harness.
- Moisture or water found inside the lamp housing or at body grommets.
This wiring harness is a practical replacement for vehicles showing the symptoms above. Use the product code 6534KJ when searching or ordering to ensure a quick match for Citroën C8 / Peugeot 807 rear lamp electrical repairs.
