This is a simple solution for your trip computer and its backlight. FYI, all the trip computer have a backlight. If your backlight was not working for some reason, and you want to check your mileage every now and then (specially at night), guess what you need?
I will show you how to fix that problem. To get to trip computer, you need to take apart the overhead console. Detailed steps are given at Wolgang's page. Heres the
link
Now, after you open trip computer, all you need to do is open up the display and get to three bulbs underneath. Since the bulbs are not working at all, you can just pull it off. Don't worry, we will replace it with LEDs. Take a look at the picture attached. You can see two bulbs still attached but the last one (DS3) is taken apart. You can do this with all three bulbs, or just the centre one. We need the centre bulb removed to attach LEDs.
Now comes the little tricky part. You need to attach 3 LEDs to the circuit. All three LEDs must be is series (I tried 1 LED but didnt work). The circuit powers 12V to the bulb so 3 LEDs are minimum. Make sure they are connected in series and not parallel to each other. If you look at the picture, all I did was solder 3 LEDs in series and then soldered the ends to the circuit. Now just remember that LEDs are diodes, so it will only work in one way. You have to figure out the positive and negative ends of LED. I suggest using alkaline batteries to check the ends. On the circuit, the end towards the "glass breakage sensor" is negative.
That's it. You are ready with your newly installed backlight. You can choose any color of LED you want. I even recommend putting multi-color LEDs to make it fancy. Completely up to you. After putting your LEDs, follow Wolfgang's instruction in reverse to install you console back. There are few pictures attached for your help.
Hope this helps you. If you need additional help, just PM me and I'll try my best.
Attachment 148228 After installation
Other Pics:
Attachment 148211 Before installation. 1 bulb removed.
Attachment 148223 All three bulbs pulled out in my case.
Attachment 148218 All three LEDs in series with the circuit.
Attachment 148226 Final assembly of trip computer. Just before putting it on console.