I have a 2003 g35 sedan and I Can’t figure out or find this plug anywhere (red/white, red , red/black, green , yellow) 1-3 pictures. The black plug is 4-5pictures (blue white and black) anyone know what plugs these are? 2003 M1 harness

 

Not completely sure what you are asking?

-I can't find where this harness plugs in to?

-I can't find a replacement for this damaged harness?

For the former, are you throwing any OBD2 codes? If not then it might just be an extra harness for options your car didn't have.

For the latter, cutting a harness off a donor salvage vehicle is a good way to replace harnesses. Some items like cam, crank, etc you can just buy new replacement harnesses on the internet.

Be sure to solder and shrink tube all engine bay wiring, you CANNOT just use crimp butt splices. If you aren't comfortable soldering you can buy "solder shrink connectors" and just use a heat gun, they have solder inside that will melt as the tube shrinks.