Illuminated Rear Heated Window Switch

E30 Illuminated Demist Switch. Smithy318i

For some reason BMW didn't fit all E30s with an illuminated demist switch.

This is a simple to follow guide, to covert your demist switch into an illuminated one.

YOU WILL NEED:

   * A spare hazard warning switch.
   * Two lengths of wire with connectors attached (one 20cm and the other 5cm). Connector PN. 61 13 1 358 924
   * Stanley knife blade.
   * Wire cutters.
   * Electrical tape.
   * Small flat screwdriver.
   * Soldering iron.

IN-CAR PROCEDURE:

 1.) Remove the blanking plate next to the demist switch with a combination of the Stanley knife blade and the screwdriver.
     Don't try and use only the screwdriver on the switches, as this can result in damage to the dash.

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 2.) you will then be able to extract the demist and hazard switches by inserting your index finger and pulling them towards you.
     Once you have extracted the switches from the dash, you can unplug them.

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 3.) Use the screwdriver to unclip the plastic cover from the front of the demist switch plug.
     Some plugs have a white plastic peg in the top left pin hole. You will need to extract the white peg (if fitted)

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 4.) Take the 20cm piece of wire and plug the connector end into the hole marked number 7.

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 5.) loop the wire through the two switch holes in the dash.

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6.) Take the hazard warning plug and strip away a small piece of insulation from the grey/red wire (pin 7) then solder the 20cm piece of wire to it.

Wrap the joint with electrical tape.

You can now plug in the hazard switch and insert it back into the dash.

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7.) Now going back to the demist plug, strip away a small piece of insulation from the brown wire (pin 6) then solder the 5cm piece of wire to it. Insulate the joint using some electrical tape.

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8.) Then plug the connector end into the hole marked number 8.

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9.) You can now re-fit the plastic cover to the front of the plug.

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