A sticking trip counter that won’t reset is a common “feature” of the SD1, and one that I’m keen to fix on my car.
Handily a spare speedo cluster was one of the parts I picked up on the weekend. This also had the sticky trip counter, so I decided to practice on this and if it works well then when I remove my cluster to swap the better lens over, I’ll fix my cluster too.
You can see the lens although dirty is generally in good shape with only small marks on it. My current one was “marked” at the 60MPH/100KPH mark; obviously the previous owner had issues seeing the open road speed
At this point all the numbers should spring to zero. Clearly it isn’t working. On a whim I tried spraying some silicone spray onto the mechanism, and bam, everything freed up and suddenly it all worked like it should. The numbers all popped to zero
Now, obviously it’s a lack of lubrication in the mechanism that is binding it all together and making it stop working. I suspect that if you’re careful and drop a couple of drops of oil into the mech you may not even need to remove the needle and face. This is promising, next I’ll try on my real cluster and see if I can fix it.
Moving along, whilst here I removed the tacho to see why my one seems to show signs of dry solder joints. It worked occasionally, and when it didn’t a swift whack on the top of the dash would bring it back to life. It’d be nice to reconnect, fix it and have it working again. Three screws on the rear and out the dial comes.
Its stuck down with some double-sided tape, which I cut through with a razor. The solder is only on the top of the board, not through hole. There isn’t much room to work, but I suspect if im careful I should be able to clean up and resolder the joints on the board.
That’s where I’m at for now. I’ll need to remove my cluster and do some work to it, now that I have an idea of what im doing. Good start.