I try to connect my A518 OD activating by means of switch

67Dart273 said
!!!NO!!!!! There are TWO SEPARATE connectors on hydraulic trans with OD.

1...The neutral safety switch sticks out "horizontally." This is the 3 pin switch---the center pin goes up to the starter relay and GROUNDS the relay in park or neutral so that it will operate when powered from the ignition switch "start" power

The two outside terminals are the reverse switch. One terminal gets 12V from ignition switch, and the other outside terminal powers up the reverse lights with transmission in reverse

2....The OD switch points upwards VERTICALLY and is mounted somewhat above the NSS on a "shelf" near the shifter shaft. This one is the switch which is discussed earlier in this thread.

Here we go........a photo stolen from the web.......

View attachment 1715659169

Yup, understand they are diff. Good on the OD setup. Trying to understand how to make the NSS work for my build. Gen III Hemi swap, push button start. I need to run my 12v through the NSS (inline) on its way to the starter solenoid. Need the safety switch to complete the circuit, or conversely interrupt it if not in neutral. Has stand alone engine harness and aftermarket chassis harness so all OEM wiring is out. Does the NSS ground itself or only complete the circuit ran through it?