Description
Glow Relay Cartier for Citroën and PEUGEOT Vehicles. Used part with functional warranty.
Overview
This Cartier glow relay (also referred to as glow‑plug relay or preheat relay) controls the current supply to the glow‑plug circuit on diesel engines. It is an OEM‑style relay commonly fitted to a range of Stellantis Citroën and Peugeot models. Designed for professional garages and experienced DIY mechanics, this replacement relay is identified by product numbers 9663696380 and 598140 and helps restore reliable preheating and cold start performance.
Compatibility
- Citroën C4 Picasso
- Citroën C5
- Peugeot 307
- Peugeot 407
Technical Information
- Manufacturer: Cartier
- Model: Suitable For Listed Citroën And Peugeot Diesel Models
- Product Codes: 9663696380, 598140
- Additional Numbers: 598140 | 9663696380
Function And Symptoms
The glow relay provides timed power to the glow plugs during engine preheating and, in many systems, remains part of the glow control strategy used during cold running. When the relay fails, typical symptoms include extended cranking time, hard cold starts, glow‑plug warning light on the dash, or intermittent starting problems. In some cases a failed relay can cause the glow‑plug circuit to remain permanently energized, which risks overheating the glow plugs or wiring.
Replacement Procedure (Summary)
- Always disconnect the vehicle battery before starting work.
- Locate the relay—usually in the engine bay fuse/relay box or mounted on the engine bay bulkhead. Refer to vehicle manual for exact location.
- Disconnect the electrical connector(s) and any retaining clips or screws.
- Remove the old relay and fit the replacement, ensuring correct orientation and secure mounting.
- Reconnect connectors and battery, then verify correct operation: check glow‑plug indicator, measure voltage to glow‑plug circuit, and perform a cold start test.
- Inspect related wiring and fuses; replace any corroded terminals or damaged cables to prevent repeat failures.
Recommended Installation
Fitment is straightforward for trained technicians. Use proper hand tools and, if available, a vehicle service manual for access instructions. Verify the relay part numbers before installation and ensure connectors are clean and firmly seated. After fitting, test the glow system and clear any diagnostic codes. If the vehicle has repeated starting faults, check glow plugs and the entire control circuit for shorts or high resistance.
Why This Part Most Commonly Fails
- Electrical Contact Wear: Heavy switching currents and repeated thermal cycling can wear or weld internal contacts.
- Corrosion and Moisture: Water ingress and corroded connectors increase resistance or interrupt the circuit.
- Overload From Faulty Glow Plugs: A failing glow plug can draw excessive current and damage the relay.
- Heat And Vibration: Prolonged exposure to engine heat and vibration can degrade internal components.
Additional Notes
This is a used Cartier relay supplied with a functional warranty. Before replacing the relay, confirm fault symptoms and inspect related components (glow plugs, wiring, fuses) to avoid replacing the relay unnecessarily. Suitable for professional mechanics and competent DIYers familiar with diesel glow systems and safe electrical practice.
