Can anybody put me in the right direction do you need to rewire your engine harness if your gonna put a gsr obd2 in there like the part that came out of the car? Thank you for post if you can help?

 

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the best and easy way to do your wireing harness is to use your stock d series harness...take your stock harness, tare off all the black covering so all thats showings is a bunch of wires and plugs..now start to plug it up to the motor...the plugs that dont reach and you already tried to route them in a diff. place, thats when you need will need to extend them to reach...after your done take the black covering that you took off and cover it all back up and now it looks stock again...got it..good

the 2 pictures above will help out ALOT

 

thanks alot homey it should really help