hi, I have a 1977 Land Rover series 3 2.25 diesel. the cold start light doesn't seem to ever come on. I am wondering under what conditions should the light be on. when the glow plugs are on? it could be that the bulb is blown? thanks.
The bulb is no 15 and you might be able to measure continuity across the thin wires at ballast resistor to see if it’s blown, have you the original wired in series pigtails or newer parallel heater plugs