Wiring harness

[blue sky]

I assume your interest is towards the Lucas harness rather than the Autolite one. LHD and RHD are practically identical. It all has to do where the individual electrical units are located on the car and most locations were somewhat consistant for the early cars. Horns did move around and type of steering system was a factor. There are actually three harnesses; the engine, headlight and body harness; the engine and dash harness; and the tail lamp harness. The main harness started at the generator, wrapped around the the front nose from right to left, came down the left front wing to the firewall where it connected to the dash engine harness. The harness went down the trans tunnel along the left main tube to the trunk area where it connected to the tail lamp harness. The engine and dash harness started at the wiper motor, went along the firewall where it plugged into the main harness and then penitrated the firewall to connect into the switches and gauges. This is somewhat a general description of the layout. Hope it helps.