Automatic stalls in reverse.

ratty dart 340 said
Being that you pretty much almost exactly summed up my problem I will start looking again. What you pictured above I’m assuming is the NSS? On mine, there is an obvious short on of the three wires, looks melted, it’s also above the engine before it travels down to the tranny. Maybe this wire just isn’t even sending current, or maybe to little. I will clean that up and test.

The previous owner for mine was also very un-knowledgeable. They painted the 360 and 727 blue together, and they also painted the male prongs on the NSS… I have already cleaned that up.

Not the switch it is the connection to the switch, I got a new one from Napa. Part of the harness goes thru the wiper harness. The black and black with the white tracer plugs into a tail on the wiper harness and the yellow with brown tracer goes to the starter relay. In the engine bay I found the the connection that plugs into the wiper harness missing with yellow /brown going to the starter relay and black going to a screw on the inner fender, I guess to ground it and bypass the switch, as it would start, in reverse and drive. The black/white was just hanging loose. There is also a purple wire that is in the mix that goes to the back to rear harness for the back up lights. The diagram is for a 72 Dart, but I followed it for my 70 Duster and hopefully fixed all of the many wiring issues I had...knock on wood. It was pretty bad as there were lots of bogus connections wrapped in sticky black tape and then everything and mean everything, except motor was all painted black...