under dash wire harness

F/A Tech said
I downloaded the manual but a picture of a laid out loom would be perfect. Automatic, no options. The temperature guage was not working. I measured the resistance change to the fire wall, but that is as far as I got ,now that the instrument panel is out I want to check it before putting everything together.

Read clear through section 8 and also try a year or two earlier or later. Some service manuals have drawings of the harness routing. Even if it's burned you should be able to tie-off the various branches?

Page 424 (8-203) of the 71 Plymouth chassis manual. Look on down further there are more diagrams Cluster wiring is detailed on 8-207