IGN lighting up

[Jeff Gruber <jgruber@demainsoft.com>]

My IGN light has started to come on.  At idle it is very dim and brightens 
with the speed of the engine.  Everything still works ok, even the 
headlights are bright.  When I put on the headlights the IGN light is very 
bright.

I've been driving intermittently for about two weeks with this 
condition.  Still everything works ok.

I know that means I need to take a look at my ignition/electrical 
system.  Can anyone tell me what to look at first, etc?

Thanks.