Description
Complete parking assist harness from a Citroën C3 Picasso
Description
This used parking distance control (PDC) wiring harness is taken from a Citroën C3 Picasso and is ideal for professional workshops and experienced DIYers looking for a direct-fit replacement part. The harness connects the rear parking sensors and associated connectors to the vehicle’s PDC control module and power supply, ensuring reliable communication between sensors and the vehicle electronics. Customers often search by product codes 20103747 or 6584Y9 when looking for this exact harness.
Benefits
- Direct-fit harness designed for Citroën C3 Picasso PDC systems.
- Restores sensor wiring continuity and connector integrity without modifying factory components.
- Saves time compared to fabricating a new loom or repairing multiple individual wires.
- Useful for repairs after collision damage, corrosion, or connector failure.
How It Works
The harness routes power and signal lines between the reversing sensors, the PDC control unit and vehicle ground points. When the vehicle is placed in reverse, the sensors send ultrasonic distance data through this harness to the control unit, which then processes the information and triggers audible warnings or dashboard indicators.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C3 Picasso
- Product Codes: 20103747, 6584Y9
- Other Numbers: 1.6 HDi (engine family / vehicle category reference)
Installation Recommendation
Replacement of the PDC harness is straightforward for trained technicians and competent DIY mechanics. Typical steps:
- Disconnect the negative battery terminal before beginning work to prevent short circuits and protect vehicle electronics.
- Remove interior trim panels and the rear bumper if necessary to access sensor connectors and harness routing.
- Unplug sensor and control unit connectors, taking care not to damage connector locks or pins.
- Release any retaining clips and gently remove the old harness, noting the routing and fastening points.
- Install the replacement harness following the original routing, secure all clips and connectors, and reconnect the battery.
- Verify operation by engaging reverse gear and checking sensor beeps and any dashboard indications. If available, use diagnostic equipment to confirm sensor and control unit communication.
Why This Part Fails Most Often
- Water Ingress And Corrosion: Moisture entering connectors or damaged insulation leads to intermittent signals or open circuits.
- Physical Damage: Impacts, bumper removal, or previous repairs can pinch or sever wires and break clips.
- Connector Pin Damage: Bent or corroded pins cause poor electrical contact and sensor malfunction.
- Rodent Damage: Chewing can sever wires along exposed sections of the loom.
Practical Tips
- Protect connectors with dielectric grease to reduce corrosion risk after installation.
- Secure the harness with original-style clips and avoid tight bends to prevent future stress points.
- When replacing sensors at the same time, check connector pin condition and replace any clips or grommets that are brittle or damaged.
Recommended For
Automechanics and experienced DIYers performing repairs on Citroën C3 Picasso vehicles equipped with parking assist. Frequently searched by part numbers 20103747 and 6584Y9 for direct identification.
