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I have a 2001 lexus is 300 with a 2jzgte swap running a aem infinity with a boomslang harness. It is running dual ecu setup OEM/AEM car has been tuned and running great on this set up for over 2 years. Yesterday i drove the car into work everything working as it should parked and but when i came out to leave i had a electronic nightmare. jumped in the car and it started right up but none of my gauges came on, radio and ac controls also dead clock/ outside temp where off windows wouldn't work, door locks would lock but automatically unlock. i jumped out of the car and popped the hood and my radiator fans that are hard wired to run all the time when key is on where off and alternator isn't charging. I checked most off all the ecu fuses and relays but couldn't find an issue. Figured it was an ECM issues with all the components going out at once. maybe a bad ground searched for hours and couldn't find a good pin out that shows grounds. any one have any ideas on what could be causing this?
 
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