1922-1923 BUICK Chassis & Electrical Service Manual [eb11287R] 
This manual covers chassis, mechanical and electrical. It has sections on suspension, driveline/axle, brakes, engine, transmission, etc. This book includes wiring diagrams. Published by the factory, to provide information on diagnosis, service procedures, adjustments and specifications, there is none better. It is loaded with diagrams and illustrations to show you how to disassemble, repair and reassemble the various components and frequently gives troubleshooting information. The body is included in a Fisher Body shop manual that be purchased separately.