Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello and welcome to Just Answer, my name is ***** ***** can I start with some questions to better understand the situation.
Are you able to test this with a multimeter so you can get an actual number on the amperage draw? The initial draw that you are seeing with a test light may be the ECU's remaining on, they should turn off after a set period of time. A test light really shouldn't be used with modern car draw problems, due to some circuits being 5 volts from the ECU, it is possible that the bulb in your light can overdraw an ECU if an ECU circuit was to be tested.