I've noticed that the Ignition warning lamp on my 77B will glow, albeit
very dimly, when running under relatively loads, ie: idling with
headlamps+heater fan +brake and turn signals. It all but extinguishes at
speed, and the battery does not seem to be discharging. This is my first MG,
and I have found some faults in the wiring already, so I am wondering if
this is normal or something I need to pay attention to.
On a related note, since others have recently posted regarding
electrical problems, the Scions of Lucas web page has the Lucas wiring color
code table at www.team.net/sol/tech/LucasColours.html. This, along with the
Haynes manual schematics, (and a little help from Rick Astley and Jeff Zorn)
was a great aid when I had to correct some botched wiring on my car.
Steve Murphy (77MGB)