Description
Auxiliary Harness For The START-STOP Condenser For E-HDi Engines
High-quality auxiliary wiring harness designed for the START‑STOP condenser on e‑HDi (1.6 HDi) powertrains. Supplied under OEM reference 9805917780 and produced for Stellantis platforms (Citroën / Peugeot), this harness restores reliable electrical connection and signal transmission for vehicles equipped with factory start‑stop systems. Ideal for professional workshops and experienced DIY mechanics seeking a direct-fit replacement that addresses common failures caused by age, corrosion or damage.
Features And Benefits
– Direct Fit: Manufactured to match the original routing and connector interfaces for straightforward replacement.
– OEM Reference Included: Reference 9805917780 for fast lookup and compatibility searches.
– Improved Reliability: Replaces damaged wiring that can interrupt START‑STOP function or cause fault codes.
– Service Friendly: Designed for access in the engine bay area around the condenser and related control modules.
Compatible Models
Commonly specified for vehicles with e‑HDi / 1.6 HDi engines, including but not limited to:
Citroën C4, Citroën C4 II, Citroën C4 Picasso, Citroën C4 Picasso II, Peugeot 308, Peugeot 308 T9, Peugeot 3008 I, Peugeot 5008 I.
How The Part Functions
The auxiliary harness provides the electrical connections between the START‑STOP condenser and the vehicle wiring loom, carrying control signals and power required for the start‑stop control strategy. Proper connection ensures the condenser and associated sensors/relays communicate reliably with the vehicle control electronics, enabling automatic engine stop and restart during low‑speed or idle conditions.
How To Replace (Basic Procedure)
- Park On A Level Surface And Secure The Vehicle. Switch Off Ignition.
- Disconnect The Negative Battery Terminal Before Any Electrical Work To Avoid Short Circuits Or Unexpected System Behavior.
- Remove Any Necessary Engine Covers Or Intake Components To Access The Condenser Area.
- Locate The Faulty Harness, Unplug All Connectors, And Note Routing And Retaining Clips.
- Unfasten Mounting Clips Or Brackets And Remove The Old Harness Carefully.
- Install The New Harness Following The Original Routing, Secure All Clips, And Reconnect Connectors Firmly.
- Reconnect The Battery, Clear Any Related Fault Codes With Diagnostic Equipment, And Verify START‑STOP Operation In A Safe Environment.
Note: Use proper tools and follow workshop safety procedures. If diagnostic fault codes remain, inspect related sensors, grounds, fuses, and the condenser unit itself.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: e‑HDi / 1.6 HDi Engines
- Product Codes: 9805917780
- Other Numbers: Not Available
Installation Recommendations
– Always Disconnect The Battery Before Starting Work To Prevent Short Circuits And Protect Electronic Modules.
– Route The Harness Along The Original Path And Secure All Retaining Clips To Prevent Chafing And Heat Exposure.
– After Replacement, Use A Diagnostic Tool To Clear Fault Codes And Confirm Proper START‑STOP Functionality.
– Replace Any Corroded Connectors, Ground Points Or Mounting Hardware Found During Installation.
Why The Part Fails Most Often
Failures Typically Occur Due To Connector Corrosion, Insulation Degradation From Heat And Engine Vibration, Mechanical Damage During Previous Repairs, Or Water Ingress. Repeated Engine Bay Temperature Cycles And Road Salt Exposure Accelerate Wear On Wiring And Terminals, Leading To Intermittent Faults Or Complete Loss Of START‑STOP Function.
Who Should Fit This Part
Designed For Professional Auto Technicians And Confident DIYers With Electrical Experience. If You Are Unsure About Diagnostics Or Code Clearing, Have The Replacement Performed By A Workshop With Appropriate Diagnostic Equipment.
