600dpi (overlapping) scan of the fold-out wiring diagram from a 1976 280Z FSM
Scan size limited due to permissions of the loaner FSM (do not separate diagram from FSM)
 
Credit for loan of the FSM to scan diagram: Barry from East Coast Z, Chesapeake VA

Full 1976 wiring diagram in color, from classiczcars.com member Saridout.

This is a wiring diagram created in Adobe Illustrated and saved as a PNG file. It is a large graphic file.
This does not include California specific or Automatic Transmission specific components.
This is for Federal, Manual Transmission, and Factory Air Conditioned 280Zs.

400 dpi scan of the fold-out wiring diagram from a 1977 280Z FSM

The 77 280z wiring diagram in color.  PDF
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Not completely done, but better than no color at all.
I didn't make it. It was already uploaded to this site, but I just added it to the wiring diagram list.

This is a wiring diagram for the 240z. It's a high resolution download, around 1.58MB and great for zooming into small areas.

This is a scan from the 1974 wiring diagram manual.

A high resolution wiring diagram for the 280z.

This is a color copy of the early 1971 wiring diagram. Includes "Passing Relay" circuit.

This is a color copy of the wiring diagram in the 1971 supplement Late model. No "Passing Relay" circuit

This is a color copy of the 1972 Service manual wiring diagram, Section BE Body Electrical

This is a color copy of the 1972 Service manual wiring diagram, Section BE Electrical. (For Manual transmissions)