I'll take a shot at it: you can put a 500 ohm resistor in series with your voltage source and your switch (assuming the normal 14 volts), and then put your LEDs in parallel. That way if one burns out, the remaining LEDs will continue to work. Let me know if you need a sketch and I'll be glad to send it to you. What you're trying for is about 20 to 30 mA of current for the LED's, which most are rated at. Some come with the resistors built in so be aware of that. If you go to Radio Shack, for example, you can buy the LEDs rated for 12 volts, with or without the resistor. If you have the ones with the resistor, just put them in parallel without the 500 ohm resistor. Send me a PM if you need a schematic.