and Upgrading the dashboard display for MPG (Part 3) - is here
This part (2) shows how to change the colour of the back light in the display. In this case from green to orange. Green was the original colour of the display that was recovered from a Citroen C5, but the C3 model this is fitted to has a nice orange glow to the speedo and climate control panel.
The original green display
needs to be modified to match the climate control panel orange glow from the back light The finished display looks like this:
Quite a good match for colour and much more aesthetically pleasing.
To change the colour, remove the binnacle covering the display as seen in this video:
Remove the 2 T20 torx screws and the electrical connector to allow removal of the display from the car.
With the display removed from the car, take it indoors and put it on a worktop or table and follow these instructions to dismantle the display.
Unclip the black plastic bezel top and bottom, remove and put to one side The white body is a clam shell held together by four clips. The white clips are easily broken, so be cautious. Lever up each clip just enough to slip it over the barb, do this for all four clips working carefully. With all four clips released the unit can be opened up like a clam shell to reveal a circuit board and the ribbon connector for the screen. Next step is to slide the glass screen out of its housing and fold it back on itself so the glass screen rests on the circuit board to reveal the filter. Be careful not to damage the flat multiway ribbon cable or detach it from the circuit board or the screen.
This is the green filter that I want to change to orange This is an original orange filter fitted to a smaller display. Its not used in this project, but shown if you have an alpha numeric display you want to change the colour of. Its the same procedure for which ever colour you have or want to change to, for the larger or smaller screens. To remove the filter just slip a stanley blade between the filter and the glass carefully work the blade along the screen don't twist the blade upward, just gently slide it to the other end of the screen to break the stick seal of the filter to the screen Keep the plastic filter you have removed and use this as a template for cutting your new filter material.
I found orange filters on eBay. There are other colour filters, congo blue, primary red, primary green and a wider selection here, to choose from.
But whichever colour you want (or combination of colours by layering them) you will also need a full frost filter] to help diffuse the light to match the original frosted look.
Use the original filter as a template and cut out with a stanley blade one colour and one full frost filter piece, or two colours and one full frost filter if you are mixing and matching.
The original filter was attached to the screen with a 3mm bead of double sided sticky tape so duplicate this on each filter you are attaching (one full frost and one colour filter)
Its not very pretty but its not going to be seen, the tape applied to the edges of the full frost filter, do the same for the colour filters you are using. You are now ready to attach the filter and full frost in layers to the screen, held in place with the double sided sticky tape. Refit the screen back into its clips being careful not to damage the flat ribbon cable or to pull the cable from the screen or the board.
The close the clam shell case and allow the clips to pop back into position keeping the shell closed. Refit the black bezel to the front of the display, it just pushes back on.
While you have the display off the car now would be a good time to fit new lamps to save doing it later and make the best of your new filters. Refit the display to the dashboard after reconnecting the cable, refit the 2 screws and clip the binnacle back over the display. Ignition on and view your handywork. There is a slight variation in colour in the display with this method and I suggest a modification of 2 layers of full frost and one of orange, but not very noticeable and I may just leave it as it is.
These filters are designed to take the heat generated by the lamps without fading but you can upgrade to LED lamps if you want to.
The filters will need to be cut to size with a stanley blade or craft knife, even a pair of scissors.
The dimensions were 110mm x 25mm for the small one line display or 115mm x 35mm for the larger display - use the original filter as a template and there will be no need to measure.