we just bought an accord came with alot of spare parts headers alt, spare ecu and weird harness can anyone tell me what this harness is?? the cars runs just a few trouble codes but im thinking i need to use this harness and spare ecu.. i dunno someone help

 

what codes are you getting? there's no point throwing on spare parts before checking.


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That's a ECU adapter most likely. Someone either converted it to run as OBDI or added that inbetween the ECU and harness to install like a VAFC.