Worked on potential method of documenting Garmin avionics wiring with a spreadsheet wirelist. Decided best method was to cut and paste IO connections for each LRU from tables in the G3X Touch installation manual into Numbers. Then clean up and combine LRU, Connector and Pin into one field for vlookups. All LRUs will be listed in a left set of columns so that it is easy to see all the wires to every connector pin on each LRU. Next I need to add a right set of columns to define the connections. The right set of columns will use the combined LRU, Connector and Pin to define the connection and then vlookup to show all the other data.
This will result in two entries for every wire, but should make it easy to use with many options for sorting and filtering.
Need to consider graphical schematics. I'm thinking of using marked up examples taken from the G3X Touch installation manual. This won't be clean, but may be sufficient when used with the spreadsheet.