My '82 Diesel (I don't think that it will matter) has a burned out light that illuminates the speedometer portion of the instrument cluster.
The parts guy at H&L Mueller here in Calgary seems to think that one needs to remove the cluster to make the change.
Bently says that you can get at it throught the left hand speaker and ventilation ports.
I have tried both ways.
After removing the speaker cover, speaker and the the air deflector, and pushing the wiring bundle out of the way, I was able to reach in behind the speedo and grope around. I was not able to twist anything that felt like the backside of a bulb assembly. I bought two (one black and one white, with the aim of matching the type that lights the clock if I can get to it) bulb assemblies from the shop (bulbs in holders, not separate bulbs and holders).
Not wanting to cause damage, I tried the 'remove the cluster assembly route'. At this point I ran out of light, but not before I was left scratching my head over how to remove the cold start and headlight control stalks.
I hope in the next while to go to the self-serve wrecking yard where I may or not be able to find a similar car to experiment on, or better yet, find disassembled. In the mean while, does anyone have any recommendations (pictures would be good!) of where the bulbs are on these clusters?
Thanks for any help, Rob in Calgary