2CV dashboard indicator LED lights – fitting

With the LED dashboard lights made up they could be fitted into the dash. With incandescent bulbs the polarity of the connectors isn’t important but with LEDs the current will only flow one way to light them up and connecting them in reverse could cause them to burn out.

The Haynes Manual does have the Citroën wiring diagram which lists colours for the indicator light connectors and/or wires. Using that as a starting point and cross checking with a multimeter I came up with the following list of connectors:

  • Oil pressure warning (red)
    • Live: purple connector, green wire
    • Earth: white connector, green wire
  • Hazard warning (red)
    • Live: white connector, brown wire
    • Earth: brown connector, green wire
  • Brake fluid warning (red)
    • Live: red connector, brown wire
    • Earth: purple connector, grey wire
  • Main beam (blue)
    • Live: blue connector, green wire
    • Earth: brown connector, green wire
  • Turn signal (green)
    • Live: green connector, green wire
    • Earth: brown connector, green wire
  • Fog light (orange)
    • Live: white connector, green wire
    • Earth: brown connector, brown wire

A quick test with the dash off showed they were all working as expected.

With the lights in place the dash was harder to fit back as the wires for the right hand side previously passed through the space now occupied by the indicator light. After a bit of sorting out the cable routing the dash was fully reassembled ready for a test.

All was looking good until I got to the indicator light which didn’t light up.  After taking the dash off again the problem was obvious: the thin wire on the LED had failed at the crimp point of the connector.  Whilst disappointing, this was something I had thought might be a weak point so made up a better version.

With everything in place the lights did look the way I’d intended, they are slightly different to the originals but using the original bezels means they do look appropriate for the car.

2CV LED dashboard indicator lights in place

I’ve only tested them in daylight so far but I have a feeling they may prove a bit too bright for night time use.

2CV LED dashboard lights in action

Other posts in this series

  1. Deconstructing 2CV dashboard indicator lights
  2. 2CV dashboard indicator LED lights – proof of concept
  3. 2CV dashboard indicator LED lights – prototype
  4. 2CV dashboard indicator LED lights
  5. 2CV dashboard indicator LED lights – fitting