If you are looking for a seat back schematic, the only thing I've found showing the seat and the 4 (2 seat, 2 roof) rear compartment courtesy lights as used on some models is mixed in with the special limo and long wheelbase car info -- 2250 and 2270 bodies. The single seat back lighter is shown with schematics of the regular cars.
Ignoring the stuff in special vehicles that's obviously not in regular cars such as dual lighters, buzzers, and driver compartment lights, the rest looks to be a close approximation to how the ordinary cars were wired. You will have to take account the different mounting locations (and quantity) of some switches.
The schematic is in this counselor article but not the best quality. If you do need one, I can post a better scan.
https://www.packardinfo.com/xoops/html/downloads/SC/SC-VOL21NO23.pdfThis Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=106109