Description
Complete Positive Battery Cable With Harness For 1.8 16V And 2.0 16V Engines. It Is From Peugeot 407 1.8 16V (6FY).
High-quality replacement positive battery cable and wiring harness designed for Citroën and Peugeot petrol engines 1.8 16V and 2.0 16V. Engineered to restore reliable starting and charging performance, this complete cable assembly fits original routing and mounting points used on Peugeot 407 vehicles (engine code 6FY) and compatible PSA models. Frequently searched by part numbers 9662165780, 9651841580 and 5642FY, this harness is aimed at professional mechanics and experienced DIYers who require a direct-fit solution that simplifies installation and reduces downtime.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Peugeot 407; Engines 1.8 16V (6FY) And 2.0 16V
- Product Codes: 9662165780, 9651841580, 5642FY
- Other Numbers: NFP, 6FY
Fitment And Function
This assembly provides the main positive feed between the battery, starter motor and charging system. It includes battery terminal connection, associated fuses/holders (where applicable), and factory-style clips to secure the harness along the engine bay. Proper function is essential for reliable engine cranking, charging stability and to prevent voltage drop under load.
Replacement Procedure (Overview)
Recommended For Professional Mechanics And Confident DIYers. Typical Replacement Steps:
- Park Vehicle On A Level Surface And Isolate Electrical System.
- Disconnect Battery: Remove Negative Terminal First, Then Positive.
- Label Or Photograph Routing And Connections To Ensure Correct Reinstallation.
- Unbolt The Old Positive Cable From Battery, Starter/Starter Solenoid And Any Fuse Holders Or Junctions.
- Remove Old Harness Clips And Grommets, Then Route The New Cable Following Factory Path, Securing All Clips.
- Connect Positive Terminal And Secure All Bolts/Clamps To Manufacturer Torque Specs; Reconnect Negative Terminal Last.
- Verify Tightness, Clean Any Corroded Contacts, Start Engine And Check Charging Voltage.
Installation Recommendations
- Always Disconnect Battery Before Work. Disconnect Negative Terminal First To Minimize Short Risk.
- Inspect Battery Terminals, Starter Stud And Alternator Post For Corrosion; Clean With Appropriate Tools And Protect With Anti-Corrosion Compound If Needed.
- Ensure Correct Routing Away From Hot Components And Moving Parts; Use Factory Clips Or Secure With Suitable Ties To Avoid Abrasion.
- Replace Any Damaged Fuse Holders Or Rubber Grommets To Prevent Water Ingress And Electrical Faults.
- When Reconnecting, Attach Positive Connections Firmly Then Reconnect Negative Terminal; Verify Charging System Voltage After Installation.
- Use Appropriate Personal Protective Equipment And Follow Safety Procedures To Avoid Short Circuits When Working With Battery Cables.
Why The Part Most Often Fails
Positive battery cables and harnesses typically fail due to corrosion at terminals and connection points, heat-induced insulation degradation, mechanical wear from vibration or chafing, and exposure to battery acid or road contaminants. Broken or loose crimps and connectors, as well as damaged grommets that allow moisture into the harness, are common causes leading to voltage drop, poor starting, intermittent charging or complete loss of supply to the starter.
