Originally Posted by simplyconnected
Another small advantage of the resistor is, it passes just enough power to stop nuisance flickering at idle speeds. The diagram below shows the GEN light connected to the 'I' terminal of the VOLTAGE REGULATOR. It turns the voltage regulator on, which in turn turns on the internal solid state components. Otherwise, if on all the time, the battery would drain.
Thanks Dave. Your term "flicker" isn't how I would describe what happens to my GEN light. It's off after start up, but starts to glow brighter when the alternator can't charge the battery as well as added electronics increase draw. I'd describe it as acting as a volt meter idiot light.