Oh. I run into that all the time with the silly GM car radios. Head to Radio Shack and look for a 12 volt "grain-of-wheat" bulb with wires that you can cut and solder in. I can't help you with the current rating. The higher the current, the brighter the bulb will shine. I figure that out with radios by trial and error.
Try to position the bulb so the filament is at the same height as the original one was. Depending on which way the light goes to shine onto something, you will want to turn the bulb so the filament has the maximum exposure. It will look like an upside-down "V". You would like all of that "V" to shine towards what it's lighting up.
Once you're happy with the brightness and position of the new bulb, drape a little bridge of silicone gasket sealer across it and onto the plastic ribbon cable. That will hold the bulb in position and reduce vibration. Don't go wild covering it all up because you might have to replace it again in the future.
Tuesday, April 19th, 2011 AT 11:04 PM