So right now I have the Sylvania LEDs in my dome and license plate lights. They look great when they work but occasionally one will go off. Then after I restart the car after a while it will come back on. I know some LEDs have built in heat sink and resisters. I'm not sure if the Sylvania's have either. And I also know LEDs have almost no voltage. I saw a post about the voltage actually being low enough that the car thinks the bulb is actually out. I'm just wondering what going on. Any input would be great. Thanks.

 

Just try some different bulbs they are very cheap.

 

If it's only one license plate light that's not working all of the time, you could always try switching bulbs between them and see what happens. My license plate lights weren't working when I bought my car. I took them out and they were full of mildew and dirt which prevented them from making a good connection. So you might try cleaning the connections on the housing. The fact that LEDs have lower amperage than incandescent bulbs wouldn't prevent them from working. At worst you would get a light on the dash that said a bulb was out, but the LEDs would keep working.