Its gonna be hard if you cant read the diagrams. Just start with one wire at a time and try to follow it through the diagram. Something easy like headlights. Sometimes it helps to start at the end(light) and read back to the beginning(switch).
"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."
1957 GMC 150
| 
