Description
Supply cable to the START-STOP capacitor for e-HDi engines.
Durable OEM-style supply cable designed for the START‑STOP capacitor used on e‑HDi diesel engines. This harness cable (OEM 9678697880) ensures reliable power transfer between the vehicle electrical system and the START‑STOP energy storage module, supporting quick restarts and stable low-voltage operation. Ideal for professional workshops and experienced DIY mechanics searching by part number or vehicle application. Compatible with a range of Citroën and Peugeot models listed below.
How It Works
The cable transmits high-current pulses between the START‑STOP capacitor and the vehicle’s electrical network during engine stop/start events. It must maintain low resistance, good mechanical fixation and corrosion‑free contacts to guarantee immediate starter assistance and prevent electrical faults recorded by the vehicle ECU.
Suitable Models
Common vehicle applications include: Citroën C4, Citroën C4 II, Citroën C4 Picasso, Citroën C4 Picasso II, Peugeot 3008 I, Peugeot 308, Peugeot 308 T9, Peugeot 5008 I. Always confirm fitment by OE number 9678697880 when searching.
How To Replace
- Prepare: Park on level ground, engage parking brake and wear appropriate PPE.
- Disconnect the negative battery terminal and wait a few minutes to avoid short circuits.
- Locate the START‑STOP capacitor and trace the supply cable to its connectors and grounding points.
- Carefully release any retaining clips and disconnect the cable from both ends. Inspect connectors for corrosion or heat damage.
- Install the new cable, ensuring correct routing away from moving parts and hot surfaces; secure with original clips or equivalent fasteners.
- Tighten electrical connections to the manufacturer’s recommended torque (refer to service manual) and apply dielectric grease on exposed terminals to limit corrosion.
- Reconnect the battery and perform a system check: verify starter operation, check for stored fault codes and confirm START‑STOP functionality.
Installation Recommendations
- Disconnect the battery before any work on the START‑STOP system.
- Use a multimeter to verify continuity and low resistance after installation.
- Replace any damaged clips or grommets to prevent chafing and water ingress.
- Keep the cable routed away from hot components (exhaust manifold, turbo) and moving parts.
- When tightening, follow manufacturer torque values; if unknown, use careful, even tightening to avoid crushing terminals.
Most Common Failure Reasons
- Corroded or oxidised terminals due to moisture ingress, leading to increased resistance and electrical faults.
- Mechanical damage from chafing, improper routing or pinching during past repairs.
- Heat degradation of insulation from proximity to hot engine components.
- Loose or poorly seated connectors causing intermittent contact and fault codes.
- Rodent damage or accidental abrasion in the engine bay.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C4; Citroën C4 II; Citroën C4 Picasso; Citroën C4 Picasso II; Peugeot 3008 I; Peugeot 308; Peugeot 308 T9; Peugeot 5008 I
- Product Codes: 9678697880
- Additional Numbers: No additional reference numbers known
This cable is commonly searched by its OE number 9678697880 — include that number in listings and searches to improve findability. Designed for professionals and experienced DIY mechanics, it restores reliable START‑STOP operation when the original supply cable is damaged or corroded.
