what do you say the problem is when the rear lights sign is on and car will not

not sure what the problem is exactly. car wont start or lights? if the lights are on but the car isnt running you will deplete your battery very quickly thus car wont start. if thats the case change the battery. good luck

lexus on older models has a rear light module, sometimes it will keep the brake light on all the time and it will kill your battery, and it can keep that rear light sign on the dash board on, and some times it can make the lights in the back not work and keep that light on. it could be two different problems also. hard to say with out seeing the car. does car not start? does it crank?