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NEED HELP buzzing LEDS

Rollineuro

Go Kart Champion
Location
Reno
So I just installed e-level in my r32 and when I hooked up the battery and tested the system I noticed a really loud buzzing coming from my LED tails along with flickering LEDs and interior lights. My door open warning light is also flickering rapidly. My battery was holding 11.85v while the car is off so I replaced it and it didn't change anything. Did I blow a CECM? I reverted all the wiring back to stock to diagnose the problem so the e-level is irrelevant right now. I cleaned the terminals, made sure the main ground was good and tight, and tried resetting everything. What is my next step?
 
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