new to board have some questions

[Youey]

hey just picked up a 69 c10 stepside, runs and drives just like everything its a project. my first biggest thing is under dash the wiring looks like crap and i think its time to replace it. under the hood its been replaced already. Anyone know where i can find that? anyway my biggest problem i want to figure out is why the headlights dont work but all the markers do. i replaced dimmer switch still nothing. i dont even get power to headlight plugs. thats one of my main concerns at the moment. plans for the truck is to restore it, make it a someone daily driver. ill have alot of questions as i go through the truck as its my first c10 that i will restore. ive restored a 1970 mustang that i did a few years back.