So I bought this 350z and this dude wired up the headlights all f’d up, I’m trying to go back to stock or fix this setup. can anybody point me in the right direction thanks in advance

 

2005, right?

And it looks like you have the halogen (non-HID). Is that correct?

 

yes 2005 non rev up and not sure here’s what the bulbs look like

 

So factory halogen. You should have a 6-pin connector.

I would begin by removing all of the shrink wrap, cutting the wires, re-stripping them, and re-soldering them so that you have a clean connection once again. Don't forget to place heat shrink, or at the very least electrical tape, to cover and protect the new joint.

Here are the wiring colors so you can ensure all is proper:

6 pin (halogen) wiring colors:

1:Green/white. 12v+ Turn signal
2:Red/yellow. 12v+ High beam
3:Black. Ground. H/L beams
4:Black. Ground. Parking light/turn signal.
5:Red/blue. 12v + Parking light
6: Red/black. 12v+ Low beam

Do your lights currently function and you just want to clean it up, or is it so bad that they do not function fully?

 

Ewww, that's a mess. 813's post is correct for the color coding for the left side. The wiring on the right side may be slightly different. Check this out for the RH colors: https://my350z.com/forum/exterior-an...l#post10994098