Description
Complete digital air conditioning harness for Peugeot 307 from 2005.
Product Overview
High-quality replacement wiring harness for the digital air conditioning system fitted to Peugeot 307 models from 2005. Designed for professional workshops and DIY mechanics, this harness restores reliable electrical connections between the climate control module, blower motor, actuators, temperature sensors and the A/C compressor clutch. Ideal when original wires or connectors are damaged by wear, corrosion or accidental impact.
Key Benefits
- Direct-fit replacement for the original harness, compatible with factory routing and connector types.
- Helps eliminate intermittent faults caused by corroded plugs, broken conductors or poor grounding.
- Supplies the correct connections for digital HVAC functions including blower speed control, flap actuators and temperature sensing.
- Sold under common product references to simplify searching: 6445YX, D5384.
Function And Application
The harness provides the electrical backbone for the digital climate control system. It links the climate control head and electronic control unit to the cabin actuators (blend and flap motors), blower fan, temperature sensors, and the A/C compressor clutch circuit. Proper operation of these circuits ensures accurate cabin temperature regulation, automatic climate modes and reliable compressor engagement.
How To Replace
- Preparation: Park the vehicle on a flat surface, engage the handbrake and disconnect the negative battery terminal before starting work.
- Access: Remove the necessary dashboard trim and instrument-panel shrouds to reach the climate control unit and associated harness routing. Keep fasteners and clips organized.
- Disconnect: Carefully unplug all connectors from the climate control unit, actuators, blower motor and sensors. Release any retaining clips and cable ties holding the harness in place.
- Remove And Install: Detach the old harness, paying attention to routing through bulkheads and under-dash clips. Fit the new harness following the original routing, secure with new ties or clips as required, and reconnect all plugs.
- Test: Reconnect the battery, then verify all HVAC functions — blower speeds, automatic modes, temperature response, flap actuators and compressor engagement — before reassembling trim panels.
Installation Recommendations
- Always isolate the battery before disconnecting or connecting the harness to avoid short circuits and potential ECU damage.
- Inspect connectors and mating surfaces for corrosion; clean or replace corroded plugs to ensure reliable contact.
- Replace damaged retaining clips and secure the harness to avoid chafing against metal edges or HVAC components.
- When possible, test the climate control system functions with diagnostic equipment after installation to confirm proper communication and actuator operation.
Most Common Failure Reasons
- Connector Corrosion: Moisture ingress and salt exposure lead to poor contact and intermittent faults.
- Mechanical Damage: Chafing, pinching during previous repairs or accidental cuts can break conductors.
- Thermal Aging: Long-term heat cycles inside the dash can harden insulation and cause cracks.
- Rodent Damage: Wiring in under-dash or engine-compartment areas may be chewed by rodents.
- Poor Repairs: Incorrect splices or unsecured cables can lead to early failure and diagnostic confusion.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Peugeot 307 (from 2005), vehicles with digital climate control
- Product Codes: 6445YX, D5384
- Additional Numbers: 6445YX
Additional Notes
This harness is intended for vehicles equipped with a digital HVAC system. If the original harness shows signs of localized damage, replacing the complete harness ensures all connectors and lengths match factory routing and reduces the risk of future faults.
