> Early models had a 500 ohm resister in parallel with the bulb and > placed in the twist in type bulb holder. if they fell out or made poor > contact, the alternator couldn't charge. Don & John, I have been wanting to replace all the bulbs in my a/c panel with bright LEDs. On that thought, it would be nice to carry this idea a step further to replace the warning lights with LEDs, too. Is there a way to do this without hacking up other parts besides the bulbs? For the alternator light you would need a bias resistor for the LED and then a shunt resistor to make the circuit still work to support the alternator. Is there enough room in the bulb socket for two resistors and an LED? Walt Tampa, FL