Description
Rear Window Heating Switch Citroën Berlingo II Peugeot Partner II
This high-quality replacement switch is designed to restore reliable control of the rear window defogger on Citroën Berlingo II and Peugeot Partner II models. Ideal for professional mechanics and competent DIYers, the switch is commonly searched and identified by the reference numbers 9644851077 and 6554AF. The unit provides positive tactile feedback, integrated illumination for nighttime use and straightforward plug-and-play replacement in most installations. Replacing a faulty switch quickly brings back rear-window demisting functionality, improving visibility and safety in wet or frosty conditions.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën Berlingo II; Peugeot Partner II
- Product Codes: 9644851077, 6554AF
- Other Numbers: 6554AF | 9644851077
Function And Application
The switch controls the rear window heating (defogger) circuit, typically energizing the rear heated-glass element via a dedicated relay and fuse. It also usually contains an indicator lamp or LED to show when the grid is active. This switch is intended for dashboards and control panels original to Citroën Berlingo II and Peugeot Partner II vehicles where the listed reference numbers match.
How To Replace
- Disconnect The Battery Before Starting Work To Avoid Short Circuits And Protect Vehicle Electronics.
- Remove The Trim Surrounding The Switch Using Appropriate Trim Tools To Prevent Damage.
- Release The Switch From The Panel (Usually Retained By Clips) And Pull It Out Gently.
- Disconnect The Wiring Harness Connector From The Rear Of The Switch.
- Fit The Replacement Switch, Reconnect The Harness And Test Rear Heater Operation Before Reassembling Trim.
Installation Recommendations
- Always Disconnect The Battery Before Demounting Or Mounting The Switch.
- Inspect Connector Pins And Wiring For Corrosion Or Damage; Clean Contacts And Apply A Small Amount Of Dielectric Grease If Suitable.
- Check Related Fuses And The Rear-Window Heater Relay If The New Switch Does Not Activate The Grid—Failure Is Not Always The Switch.
- Ensure Proper Fitment And Orientation When Pressing The New Switch Into The Panel To Avoid Breaking Retaining Clips.
Most Common Failure Causes
Failures Usually Result From Worn Electrical Contacts Or Burnt Traces Caused By High Current Switching Over Time. Other Typical Causes Include Moisture Ingress Into The Connector Or Switch Housing, Mechanical Wear Of The Actuation Mechanism, And Failed Internal Illumination (Bulb Or LED). In Some Cases The Switch Appears Dead But The Real Issue Is A Blown Fuse Or A Faulty Relay In The Defogger Circuit.
Notes For Professionals And Enthusiasts
- Reference Numbers 9644851077 And 6554AF Are Frequently Used By Customers When Searching For This Part — Including These In Product Listings Improves Findability.
- Test The New Switch Immediately After Installation To Confirm Correct Operation Of The Rear Heater And Indicator Lamp.
- Keep The Vehicle Manual Or Wiring Diagram Handy When Diagnosing Related Electrical Issues.
Warranty And Quality
Supplied As A Direct-Fit Replacement Intended To Match Original Functionality. Suitable For Workshop Use And DIY Repairs Where Reference Numbers Match The Vehicle Requirement.
