I think I would have been inclined to have gone the extra few screws and seen just why the rest wouldn't work. Perhaps that's the OCD part of my one remaining brain cell spluttering into life…
Different set up to mine, its an LED in the rev counter. I'm guessing they are different on 12V's.
I had this problem on the green 80 (1993), my ocd wouldn't allow it either! The timing belt wasn't due, as I knew when it was last changed, so I removed the instrument binnacle to investigate. I found that the reset button had been pressed too hard at some point and had broken, a replacement binnacle was sourced from Karl, which I removed the switch from and fitted it to by binnacle, so mileage remained as it was. It wasn't a difficult job, just a little delicate.
On my 94, the LED in the rev counter is for turbo over boost.
My 'T BELT' light is on at the moment, it is along the lower edge of the dash and has a bulb.
I note the volt meter in your picture is showing a little low as well?
I got all OCD with my dash and recalibrated all the gauges, including the fuel gauge.
regards
Dave
Got the speedometer View attachment 102340 out and removed the bulb. Simple twist off and problem solved....
Thanks mussy, will do if they draw a blank.This Clive
The light is triggered by a purely mechanical switch Clive, no ignition etc. Your right it should be a simple 'pull the bung push the button job'. If you are pulling the dash to remove the bulb (bloody rednecks ), as it will not reset then you might as well use a small screwdriver and click the counter back, the light goes out and will come back on circa 80,000 miles.
Regards
Dave