Description
Control switch for roof sunshade for Citroën C4 Grand Picasso vehicles.
This used roof sunshade control switch is a direct-fit replacement for Citroën/Peugeot models equipped with a factory electric sunshade. Ideal for professional workshops and competent DIY mechanics, the part restores reliable operation of the panoramic roof sunshade control panel. The unit is commonly sought by product codes 96590657BJ and 649039, making it easy to find in spare-part searches and on replacement lists.
Key Benefits
Restores smooth opening and closing of the roof sunshade. Fits original mounting and connector layout, saving time during installation. Helps eliminate intermittent operation caused by worn contacts or damaged switch housings. Suitable for vehicles where the switch module is accessible from the headliner or overhead console.
Compatibility
Designed For: Citroën C4 Grand Picasso (factory-equipped with electric roof sunshade). Check the product codes below to confirm compatibility with your specific vehicle trim and equipment.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Roof Sunshade Control Switch
- Product Codes: 96590657BJ, 649039
- Other Numbers: Commonly referenced under Citroën/Peugeot internal parts lists and aftermarket catalogues
Installation Recommendations
- Disconnect the battery before starting work to prevent short circuits and accidental airbag deployment.
- Carefully remove the headliner trim or overhead console using plastic trim tools to avoid damage to clips and surrounding finish.
- Unscrew and unclip the switch module, then unplug the electrical connector. Inspect the connector for corrosion or bent pins.
- Install the replacement switch, reconnect the connector, and test sunshade function before refitting trim. Ensure all clips and screws are secured to avoid rattle noise.
- If the switch does not operate after fitting, verify fuse, power supply, and ground before replacing additional components.
Why The Part Commonly Fails
- Frequent Use: Mechanical wear of contact surfaces and internal microswitches from repeated operation.
- Contamination: Dust, moisture, or spilled liquids can corrode contacts or cause short circuits.
- Connector Issues: Corrosion, loose pins, or damaged wiring at the harness plug.
- Physical Damage: Broken plastic tabs or housing damage from improper removal or impact.
Quick Diagnostic Tips
- Check Related Fuses: A blown fuse may indicate an electrical fault elsewhere rather than the switch itself.
- Verify Power And Ground At Connector: If power is present and the switch still doesn’t operate, the switch is likely faulty.
- Rule Out Motor Or Track Faults: If switch operation is audible but sunshade does not move, the motor or guide mechanism may be at fault.
- Test With Multimeter: Measure continuity across switch contacts to confirm internal failure.
This part is supplied as a genuine used replacement and is commonly found under the catalog numbers listed above. For workshop efficiency, have basic trim tools and a multimeter ready when replacing the unit.
