Part description

The Nagares glow relay (glow relay) is a key electrical component for the proper functioning of the glow system. It ensures the switching of the glow plugs at the necessary moment, which is typically manifested mainly during cold starts. If you are dealing with worse starting, irregular glow or glow plug failures, replacing the relay is often a quick and effective solution.

This is a used car part intended for Citroën/Peugeot cars, also searchable by product numbers 9640469680 and 598140.

Technical information

• Manufacturer: Nagares
• Model: not specified
• Other numbers: not specified

Product codes

• Product codes: 9640469680, 598140

Installation recommendations

Generally/typically changing the glow relay is work on the electrical part of the vehicle and the exact procedure may vary according to the specific model and design. Below is a practical procedure typical for this type of part.

1) Before assembly

• Compare with the old part: same product numbers (9640469680 / 598140), same connectors, number of pins and identical mounting.
• Check the condition of the connectors on the relay and in the harness: they must not be bent, oxidized, burnt or mechanically damaged.
• Visually check the relay for signs of overheating (odor, plastic discoloration, deformation).

2) Necessary tools and materials

• A basic set of hand tools (typically a ratchet/wrenches/screwdrivers depending on the attachment)
• Electrical contact cleaner
• Protective gloves
• Straps (for possibly securing the cabling to its original position)

3) Step-by-step assembly procedure

1. Turn off the ignition and secure the vehicle against movement.
2. Disconnect the battery (minimize the risk of a short circuit when working with the connectors).
3. Get access to the relay (depending on the design, it may be necessary to dismantle the nearby cover/holder).
4. Before disconnecting, make a note/take a picture of the wiring route and the position of the connectors to avoid confusion.
5. Disconnect the connectors carefully – do not pull on the cables, but on the body of the connector.
6. Unfasten the relay and remove the old piece.
7. Clean the connectors and contact surfaces from dirt and possible oxidation.
8. Install the Nagares glow relay in the holder/in its original place and secure it properly.
9. Reattach the connectors – check they are fully engaged and secure without play.
10. Check the cable routing for tension, chafing and looseness.
11. Connect the battery.
12. Perform the first function check by turning on the ignition and observing the glow behavior (depending on the car’s equipment).
• 4) Post-assembly checks and test drive/function verification
  • Verify that there are no power outages and that the connectors are not getting hot.
  • Try a cold start (if possible) and observe the improvement in starting.
  • After a short drive, visually check the relay fixing and wiring condition again.

  5) The most common assembly mistakes + how to avoid them

  • Battery not disconnected → risk of short circuit and damage to electrical installation; always disconnect the battery first.
  • Swapping/incorrectly clicking the connector → manifested by non-functional glow; the connectors must fit as far as they will go.
  • Ignoring contact oxidation → even a functional relay does not work properly; clean the contacts with a cleaner.
  • Poorly routed cabling → can penetrate or pull on the connector; lead her as originally and secure.

  Reasons why the part is damaged

  • Thermal stress and aging of electronics due to operation in the engine compartment.
  • High current load of the glow system (normal wear of the contacts inside the relay).
  • Oxidation and moisture in the connectors, transient resistances and subsequent overheating.
  • Voltage fluctuations or a weak battery that can increase the load on electrical components.
  • Damaged wiring (loose contacts, penetration, unprofessional interventions), which can overload the relay.
  ]]> https://www.usedpartsvendor.com/electro-components/relay/incandescent/nagares-glow-relay-with-wiring-citroen-peugeot-9640469680-598140-2/ Sat, 15 Mar 2025 03:23:20 +0000 https://www.usedpartsvendor.com/uncategorized/nagares-glow-relay-with-wiring-citroen-peugeot-9640469680-598140-2/ The Nagares Glow Plug Relay is designed for Citroën and Peugeot vehicles, providing essential functionality for optimal engine performance. This relay is a used part that comes with a guarantee of functionality and includes a section of wiring for easy installation.

  Glow plug relays play a crucial role in the starting process of diesel engines by controlling the power supplied to the glow plugs, ensuring proper combustion for smoother engine start-up. Over time, relays may fail due to electrical wear and tear or exposure to harsh engine conditions, leading to starting issues or poor engine performance. Replacement is recommended when signs of malfunction appear, such as difficulty starting the engine or warning lights on the dashboard.

  Technical Information

  • Manufacturer: Nagares
  • Model: Glow Plug Relay
  • Product Codes: 9640469680, 598140
  • Additional Numbers: None
  ]]> https://www.usedpartsvendor.com/electro-components/relay/incandescent/glow-relay-cartier-with-wiring-citroen-peugeot-9640469680-598140/ Sat, 15 Mar 2025 03:17:49 +0000 https://www.usedpartsvendor.com/uncategorized/glow-relay-cartier-with-wiring-citroen-peugeot-9640469680-598140/ Glow Relay CARTIER CITROËN PEUGEOT With a piece of wiring for each pin.

  High-quality glow relay manufactured by Cartier for Citroën and Peugeot applications. This relay comes with a short harness piece that matches each pin, making replacement straightforward and reducing the need for extra wiring modifications. Ideal for mechanics and DIY enthusiasts working on diesel pre-heating systems, this unit is frequently searched by its OEM numbers 9640469680 and 598140. Reliable switching of the glow-plug circuit ensures proper cold-start performance and reduces white smoke and extended cranking times.

  Technical Information

  • Manufacturer: Cartier
  • Model: Citroën C2, Citroën C3, Citroën C3 II, Citroën C3 Pluriel, Citroën C5, Citroën C5 (X7), DS3
  • Product Codes: 9640469680, 598140
  • Additional Numbers: Stellantis Group Reference / OE Applications

  Function And Benefits

  The glow relay controls the high current feed to the glow plugs during pre-heating and start-up. By switching the heavy current away from the dashboard circuit, it protects the vehicle wiring and ensures the correct pre-heat timing set by the engine control unit. Supplied with a dedicated wiring piece for each pin, this relay simplifies installation and restores proper contact integrity in the glow-plug circuit.

  Installation Recommendations

  • Always disconnect the battery before starting work and follow manufacturer procedures to avoid electrical damage.
  • Locate the relay—usually installed in the engine bay fuse/relay box or in a dedicated mounting bracket near the glow-plug circuit (consult vehicle wiring diagrams for exact location).
  • Inspect connectors and mating surfaces for corrosion or melted insulation; replace or clean as required.
  • Fit the relay with the included wiring piece, ensuring each pin matches its original position. Secure connections to prevent vibration-induced loosening.
  • After installation, verify related fuses and measure glow-plug circuit continuity. Perform a functional test: confirm glow-plug indicator behavior, pre-heat duration and engine start performance.
  • Use proper tools and, if available, a multimeter to check coil resistance and contact switching under load before installation.

  Reason Why This Part Most Commonly Fails

  • High Current Load: Repeated high-current switching causes contact wear and pitting, leading to poor conductivity.
  • Corrosion and Moisture: Exposure to moisture, road salts or engine bay contaminants corrodes terminals and connectors.
  • Heat and Vibration: Thermal cycling and engine vibration degrade internal contacts and solder joints over time.
  • Damaged Wiring: Chafed or damaged harness wires can cause short circuits or intermittent operation.
  • Aging: As with all electromechanical relays, materials fatigue and insulation properties decline, reducing reliability.

  This glow relay with harness is a direct-fit replacement solution for affected Citroën and Peugeot diesel models and is a commonly referenced part by its OEM codes 9640469680 and 598140. Proper installation restores dependable pre-heating and improves cold-start behaviour.

  ]]> https://www.usedpartsvendor.com/electro-components/relay/incandescent/glow-relay-cartier-citroen-peugeot-9640469680-598140-2/ Wed, 15 May 2024 04:03:31 +0000 https://www.usedpartsvendor.com/uncategorized/glow-relay-cartier-citroen-peugeot-9640469680-598140-2/ Glow Relay CARTIER for Citroën and PEUGEOT vehicles. Used part with functional guarantee.

  This Glow Relay from CARTIER is a direct-fit electrical component commonly used in diesel models from Citroën and Peugeot. Ideal for professional workshops and experienced DIY mechanics, this relay controls the pre-heating circuit for glow plugs, ensuring reliable cold-start performance. Frequently searched by OE numbers 9640469680 and 598140, this relay is a practical replacement when the engine struggles to start in low temperatures or when the glow-plug circuit shows intermittent faults.

  Key Features

  • Direct replacement for OE Numbers: 9640469680, 598140.
  • Designed for glow-plug control circuits on diesel engines.
  • Sturdy contacts and coil rated for repeated switching cycles.
  • Useful for both workshop repairs and competent home mechanics.

  Benefits For Mechanics And DIYers

  Replacing a faulty glow relay restores reliable pre-heating timing and prevents long cranking times or no-start situations in cold weather. The relay is compact, straightforward to swap, and significantly cheaper than replacing multiple glow plugs or associated wiring when diagnosed correctly. Listing OE numbers and compatible models in the product title improves findability for technicians and parts managers searching by part number.

  Installation

  Typical replacement steps (general guidance; follow vehicle manufacturer’s procedure):

  • Disconnect the negative battery terminal before starting work to prevent short circuits.
  • Locate the relay—usually in the engine bay fuse/relay box or, on some models, inside a dedicated relay carrier.
  • Note wiring positions or take a photo to ensure correct reconnection.
  • Remove the old relay by pulling it straight from its socket or releasing retaining clips; avoid bending pins.
  • Fit the replacement relay into the socket, ensuring full seating and correct orientation.
  • Reconnect the battery and verify operation: check glow plug circuit activation, dashboard preheat indicator behavior, and engine start performance.

  Common Failure Causes

  • Contact Wear Or Corrosion: High switching currents through the relay contacts can cause pitting, increased resistance, or welding of contacts over time.
  • Coil Fatigue Or Open Circuit: Electrical stress and heat cycles can degrade the coil insulation or connections, causing the relay to stop energizing.
  • Overload From Faulty Glow Plugs Or Wiring: Excessive current draw from failing glow plugs or shorted wiring can overload the relay and shorten its service life.
  • Environmental Damage: Moisture ingress, road salt and vibration accelerate deterioration of relay internals and terminals.

  Technical Information

  • Manufacturer: CARTIER
  • Model: Citroën C4 Picasso, Citroën C5, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807
  • Product Codes: 9640469680, 598140
  • Additional Numbers: 598140 | 9640469680

  Mounting Recommendations

  • Always disconnect the battery before removing or installing the relay.
  • Inspect socket terminals and wiring for corrosion or heat damage; clean or repair as needed to ensure low-resistance connections.
  • Use dielectric grease sparingly on external terminals to reduce corrosion risk where applicable.
  • After installation, verify glow system operation and perform a road test in cold conditions if possible to confirm correct function.

  Why This Part Is Worth Installing

  Replacing a failing glow relay is a cost-effective repair that directly resolves cold-start and glow-plug circuit faults. For workshops managing diesel vehicle maintenance, stocking this relay under its OE numbers (9640469680, 598140) helps speed diagnosis and turnaround times on cold-start complaints.

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