Right headlight low beam keeps going out. Need headlight wiring help

Hello,

Like the title says, y right headlight low beam keeps going out. I already replaced the ballast, igniter and a new bulb. So now I'm thinking it's the wiring harness.

Does anyone have a tutorial or a guide on how to do this? I've downloaded the repair manuals from this website but all it does is give diagrams and not really a step-by-step tutorial.

I've downloaded the repair manuals from this website but all it does is give diagrams and not really a step-by-step tutorial. I found an electrical wiring book for the car, but he does it for a different type of car and I'm looking for something for the TSX.