"The ignition circuit" covers a lot of things. What exactly do you want to know. I have a 1963 manual with schematic/wiring diagram. If you are planning on keeping this truck then you need the
manual.In the mean time, I will try and help. Give a little more info to your question and state what your experience with wiring is.
I understand that you want replace the lamp wiring. Can you just replace with auto wire?
