How do I fix the tail lamp indicator on a Lexus LS400 when the lights are on but the bulbs aren't broken?

Sad to say, but you can't reset it due to the fact that the bulb itself has to be of OEM spec (same power output). So you can't just go to autozone and expect to buy some LED ones to replace it with your old ones so the resistance of the bulb does really matter but overall it will turn itself off with the correct type of bulb. Hope that answers your question and good luck!