The wiring was in dire need of either replacement or refurbishment.
I have posted two write-ups. The first is about how I removed all the wiring and electrical components.
The second covers how I refurbished the wiring getting rid of grunge, green corrosion and repaired terminals, and then how I installed the main harness, sub-harness’ and electrical components.
I also shot a video showing how I routed the wiring.