I need a wiring diagram for the engine?

When I purchased this car, I noticed that someone had torn apart the wiring harness that runs along the engine. I mean it looks like a nightmare anyway I need wiring diagram for this car because I'm having electric issues with this car, and I figured this way would be cheaper than buying a whole new harness. All though that would be way faster. When I connect OBD2 up to the car it doesn't want to connect or can't find it or errors out. Other times it works. I also need a wiring diagram for turn signal/headlight/multifunction switch. It's broke completely off wires in all and they just need to be soldered back to little circuit board inside turn signal switch thingy but don't know which wire goes where? There are 4 wires