I have a Lexus LS400 from 1991. The problem is that every time i drive it somewhere and park it the battery dies. So i replaced the battery, i've done this multiple times, ive brought it to my dealer and they said there is an electrical drain from somewhere in the car. So im pretty much unable to drive this car, the only way i can make sure it doesn't die is to open up the hood when im done driving and take out CHIP #10. Then when i want to drive again i open up my hood and put chip#10 back into the engine and then it works. How can i fix this problem? its not the starter and its not the battery. many dealers have confirmed this. Please help!!