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  • Instructions for converting the motion detector in the Grand California into a “normal dimmer switch

Instructions for converting the motion detector in the Grand California into a “normal dimmer switch

1 min read

Version 1.0

Was performed with the following component from Häfele:

(Unfortunately, you cannot order from the Häfele store as a private individual. You can either look for a partner store, register yourself as a trader or contact [email protected] , I may still have one in stock).

  • Lamp can be levered out with the help of fingernails without using too much force in the bathroom. Note the picture in step 2 to see which connectors are to be disconnected here on the vehicle.
  • Prepare lamp and new switch

  • Unscrew side panels and remove plastic front panel

  • Now “unsolder” the two connecting cables of the motion sensor (i.e. heat them with the soldering iron and pull them off).

  • Carefully remove the plug from the new switch (a little bit of force is probably needed)

  • Strip the wires by a few millimeters for soldering
  • Solder cable
  • If you have the opportunity, connect a 12V power supply to the cables now after soldering to test your solder joint.
  • Connect the other side of the plug with the old cable (note the colors on the photo)
  • After installation, lower and upper LEDs should burn and also be dimmable.
  • Attention: After the conversion, two special features must be observed.
    • The bathroom light turns on after each press of the main switch.
    • The light will not turn off when you press the off switch when you get in, nor will it turn off when you lock the vehicle.

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Updated on 11. September 2025
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