Description
Rear Window Heating Switch for Citroën Berlingo II and Peugeot Partner II
This replacement switch controls the heated rear window (rear window defogger) on Citroën Berlingo II and Peugeot Partner II models. Ideal for professional garages and DIY enthusiasts, the unit restores reliable activation of the rear window heater and the indicator lamp in the dashboard or switch cluster. Compatible with original part numbers 9644851077 and 6554AF, the switch is a common spare part sought by technicians and owners when the defogger stops responding or the switch illumination fails.
Key Features
- Direct replacement for original equipment switch—compatible with Citroën Berlingo II and Peugeot Partner II.
- OEM Cross Reference: 9644851077, 6554AF.
- Restores reliable operation of rear window heating circuit and switch illumination.
- Designed for easy installation in the original switch aperture—ideal for fast workshop repairs.
How It Works
The switch completes the control circuit for the rear window heating element and typically sends a signal to a relay or control module that powers the heating grid. The component also contains the switch contact and internal illumination for night-time visibility. A worn or corroded contact, broken internal mechanism or a failed lamp are the most common causes of malfunction.
Replacement Procedure
- Disconnect the negative battery terminal before starting to avoid shorts and protect vehicle electronics.
- Carefully remove the surrounding trim panel using trim tools to avoid damage to clips and panels.
- Unscrew any retaining fasteners, pull the old switch out and unplug the electrical connector.
- Plug the new switch into the original connector, check seating and reassemble trim in reverse order.
- Verify function: switch activation, rear window heater operation and switch illumination.
Installation Recommendation
Use plastic trim tools to prevent scratches. Inspect the connector and wiring for corrosion or melted insulation before fitting the new switch. If wiring or connector pins are damaged, repair or replace them to avoid repeat failures. Typically no coding is required for a simple thermal/defogger switch—replacement is usually plug-and-play, but always confirm full electrical continuity and fuse integrity as part of the repair.
Most Common Failure Reasons
- Wear of internal contacts from frequent use causing intermittent or no operation.
- Corrosion or moisture ingress into the switch or connector leading to poor contact.
- Burnt or failed illumination bulb/LED inside the switch, so the heater works but the indicator is dark.
- Damaged wiring or connector pins due to overheating or previous poor repairs.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën Berlingo II, Peugeot Partner II (generation 2003 and later models sharing the same switch)
- Product Codes: 9644851077, 6554AF
- Other Numbers: No additional numbers provided
This switch is an effective, workshop-friendly solution to restore rear window heating function on affected vehicles. Replace the switch when symptoms such as no activation, intermittent operation or loss of switch illumination are observed.
