Description
Complete digital air conditioning harness for vehicles Citroën Xsara Picasso
Manufacturer Behr
This complete AC wiring harness is designed to restore reliable operation of the digital climate control system on Citroën Xsara Picasso models. The harness connects the climate control head, ambient and cabin sensors, actuators (blend/door motors), blower motor circuit and refrigerant system controls, ensuring correct communication and power distribution across the system. Ideal for professional workshops and competent DIY mechanics looking for a direct-fit replacement listed under common part numbers.
Technical Information
- Manufacturer: Behr
- Model: Citroën Xsara Picasso (with Digital Climate Control)
- Product Codes: E4277, 6445WS, E4277004
- Other Numbers: 6445WS / E4277004 (also referenced in parts databases)
Key Features And Function
- Complete harness assembly for the vehicle’s digital climate control network.
- Restores electrical connections for control panel, sensors, actuators and compressor control.
- Manufactured to match original connector layouts and routing for straightforward replacement.
- Helps eliminate intermittent faults, communication errors and power loss to AC components when original wiring is damaged.
Typical Symptoms Indicating Replacement
- Intermittent or Complete Loss Of Climate Control Functions.
- Blower Motor Or Actuators Not Responding, Or Responding Erratically.
- Compressor Not Engaging Despite Correct Refrigerant Pressure.
- Visible Damage To Connectors, Frayed Wires Or Corrosion.
Why The Part Fails Most Often
The most common causes of harness failure are mechanical damage and environmental degradation rather than age alone. Typical failure modes include:
- Connector Corrosion Due To Moisture Ingress, Causing Poor Contacts And Intermittent Signals.
- Physical Damage From Rodents Chewing Insulation Or Wires.
- Vibration And Movement Leading To Wire Fatigue Or Broken Pins.
- Heat Exposure From Engine Bay Or HVAC Components Causing Insulation Cracking.
- Improper Previous Repairs Or Poorly Secured Routing Resulting In Chafing.
Installation Recommendations
- Disconnect Battery Before Starting Work To Avoid Short Circuits And Protect Electronic Modules.
- Follow Manufacturer Panels Removal Procedure To Access The Existing Harness; Avoid Forcing Clips Or Connectors.
- Compare All Connector Types And Pin Layouts With The Old Harness Before Final Routing.
- Secure Harness Using Factory Clips And Grommets To Prevent Rubbing And Water Intrusion.
- Use Contact Cleaner And Dielectric Grease On Connectors If Corrosion Is Present; Replace Damaged Plugs.
- After Installation, Verify All Climate Functions: Control Head Commands, Blower Speeds, Actuator Movement And Compressor Engagement.
- Perform A Diagnostic Scan For Fault Codes And Clear Stored Errors Following Repair.
Notes For Purchase And Search
Many customers locate this part by product code: E4277, 6445WS or E4277004. Include these numbers when searching to find matching listings quickly. Intended For Citroën Xsara Picasso Vehicles Equipped With Digital Climate Control.
