UPDATED/shortened: 5/8/2019 11:59AM
My 63 series-62 started and ran great up until about 9 months ago. I was cranking it as usual, and on maybe the 4th attempt, all the sudden it went completely silent. Not a single noise when attempting to crank, no sign of life whatsoever.
Turns out, the cause of this was the Neutral Safety Switch. I jumped the purple and blue NSS wires together, and then I was able to start the car and get it running!
Part 2. I ordered a new cranking harness from Jason, because in diagnosing, I noticed mine was melted behind the ignition switch. I had questions about where each part of the harness connects to.
I have the shop manual, and I look at the starting circuit diagram, and for the most part it makes sense, I just wish they included the color and gauge of each wire in the diagram, that would make things so much easier.
Then, Anders pointed me to a giant color coded wiring diagram which I've just ordered, and that should get me going: https://www.classiccarwiring.com/1963-cadillac-color-wiring-diagram/
Thanks for the help, much appreciated.
Now I just need to find or figure out how to repair the NSS.
3 years ago I bought a wiring diagram (the largest version). I'm very satisfied with it.
The supplier is listed on our "Parts Suppliers" list.
Here is a direct link for your car:
Thanks, that is awesome, original factory wire colors! I am ordering this now.
Check the NSS to see if it is letting 12V go through it to the starter. You can always jump the 2 wires together, but that disables the safety feature.
That wiring diagram is a very nice thing to have
Anybody know of something similar for a vacuum diagram? That'd also be nice.
Should be in the help tab up top.