Cab wiring problems

[wileecoyote427]

I have an 84 c30 was a dump truck in a former life now sports a home grown flatbed. Have some issues with the lighting and electrical isn’t my thing it has no interior lights 2 sets of wires looped together I assume one is the clutch safety switch the burned spot on the fuse block is where a flasher is at not sure what got it so hot that it did that the solid green one that looks burnt and the brown and yella wire looped are for I have a factory 84 service manual but it’s not the greatest trying to read the wiring layout