Question on instrument panel wiring (72 Dart Swinger)

You can download a 72 shop manual for free right here:

[ame="http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf"]http://www.abodyjoe.com/pictures/Misc.%20car%20info/1972%20Plymouth%20Chassis%20Serv%20Man.pdf[/ame]

Somewhat simplified, possibly not complete wiring diagrams:

http://www.mymopar.com/downloads/1972/72DartA.JPG

http://www.mymopar.com/downloads/1972/72DartB.JPG

You can easily trace where they go right from the PC board on your cluster

For example, look through the lamp socket on the far left as viewed from the back. Is that the brake warning lamp? Notice that one trace connects both of the sockets together and goes over to the pin right next to the "key" in the locator pin. This is 12V power

Notice the other socket pad trace comes off the bottom of the far-end socket, and goes to the 2rd pin from the "key." Now go to the diagram, and this is no 10, black. Follow this down the page of diagram "B" and off the page, a couple of wires below the "big thick" RED ammeter line

Now pick that same wire up on diagram "A." Follow this over and see that it goes to bukhead connector terminal "M" where it goes out into the engine bay. This ends up at the brake warning switch