Hi Flying Scotsman,
I too have a 90 with a discovery 200 TDI fitted, would you believe I have no ignition light either!! I only bought it 2 weeks ago and still checking it over. Wonder if the conversion is any reason for no ignition light? I have checked the bulb and its not that.
Need to meet up sometime to compare vehicles , I am in south Ayrshire ,
Cheers
Donald