Exact OEM Reproduction Wiring Harnesses for Classic Our wiring harnesses are brand-new and better than N.O.S. (new old stock) THE PROBLEM: Let's face it folks, NO automobile manufacturer ever designed a wiring harness to last 30-60 years. As a matter of fact, your vehicle's original wiring was only designed to last 10 years before it started to deteriorate! There is ample documentation to substantiate this claim. 1954 Buick Wiring Diagrams - Hometown Buick 10-59 1954 buick circuit diagrams and 1954 buick fuse block This Section contains 1954 Buick wiring diagrams for chassis and body. The 1954 Buick wiring may be easily traced by paying attention to the color code on each wire and the color code indicated on the diagrams.