Leaderboard

To do digital to analog, you will need a mechanical speedometer cable, an analog fuel sending unit (it has a green connector), and it makes it much easier if you have a parts interior harness so you can splice the stock analog plug end on (I have one if you need it), unless you have a different preferred plug like deutsch, weatherpack, etc. It will be harder to convert back to digital in this case, as the digital dash has plugs right into the cluster, unlike the analog which has a pigtail. But if it doesn't work, you probably don't care. I would buy the parts you have remaining (you will have a leftover digital fuel sending unit (blue plug), and a speed pulse generator that you will have to remove to install the mechanical speedo cable, DO NOT THROW THIS STUFF AWAY!!! I will buy them) and the cooked cluster if you want to do this swap. I like fixing boards. Be aware that it isn't super easy to swap this stuff; it does make it easier if I make the schematics

The technica cluster does not need any signals from the ECU. I can provide you the entire pinout and schematic that I have drawn up, although the colors may be inaccurate as I put it in an 87. It is currently unfinished. I converted my car from analog -> digital gauges and still need to finish the HVAC patch cable that I've been putting off, but the rest of it is finished and confirmed working. When this is done completely, I will be posting the schematics for free for anyone to use (unlike a lot of people who have charged for these things in the past). I can send you the unfinished one if you'd like