Re: What Is This And Why Is It Trying To Burn up ??
I highly suggest tracing this out. The white connector is not factory. I take it you are not the original owner?
What ignition system do you currently have in the vehicle, and how does it get it's power?
Nothing should be getting hot unless there is a current draw thru it, so something is drawing current, whether it is to a "device" or a short to ground.
1971 utilizes the CEC (Combined Emissions Control) system. The only wire that would be getting "warm" would be that brown wire with the white stripe. That is the resistance wire that originally fed currently limited power to the time delay relay on the firewall. If the other end of that is grounded or still connected to "something", that would be heating up the harness as well with the key "on". The time delay relay is NOT the same as the anti-dieseling relay only found on AC cars for '71. The blocking and anti-dieseling relay were mounted inside the car on the dash carrier frame. I could write a book on the CEC system for '71, but I don't have time for that now
I doubt that is your issue unless someone creative has used factory wires for their own means (like the brown/white I described above).
"Pink" is GM's designation back then for switched igntion power. So if you have 12 volts on one side, you need to find the other "side" to see what is connected causing the draw and the power dissipation (the heat).
-If you don't stand for something, you'll fall for anything.