Rant: Should we trust factory wiring diagrams or just go by what we see on the bench?

Last month in Denver, I had a Cessna 172 where the factory diagram said the landing gear indicator wires should be on pins 4 and 6. But when I traced it, the actual plane had them on pins 3 and 7 from a previous repair. I ended up spending 3 hours troubleshooting because I trusted the book over my own eyes. How do you guys handle it when the schematics don't match reality, do you follow the diagram or trust what's in front of you?

2 comments

2 Comments

julia28619h ago

Exactly, I always trust the wire I'm holding over a diagram that could be wrong.

jade22114h ago

Three blown fuses in a ROW says otherwise.