QUOTE: Originally posted by On30ShayUsing the ohmeter setting, put one lead on each bulb contact. If you have resistance, the bulb is good. If the circiut is open, the bulb is bad.
QUOTE: Originally posted by cwclark you may need to step down the voltage if they are truly light bulbs..what are they rated at?...12, 5 or 1.5 volts? ..if they are LEDs start with a 1000 ohm and work down until you have one that works the light but won't fry it..a 470 ohm resistor should have worked if it's an LED
Modeling BNSF and Milwaukee Road in SW Wisconsin
QUOTE: Originally posted by jrbernier The Athearn Genesis bolb draw very little current, but vary wildly from bulb to bulb. My calculations say 700 ohms, but I have had them burn out within 5 minutes with that small of a resistor. I use a 1000 ohm resistor and they last forever(or at least the past year or so!)