riggs 74

I need to confirm if the purple wire at the neutral safety switch is the start circuit wire from the ignition switch ahead of all interlocks and relays. I am needing this wire for start circuit in the ECU on the LS swap I am doing and want to eliminate all the interlocks form the seat belt circuit. The car is a 74 auto trans with the stupid seat belt safety enter lock starter circuit.

Thanks to all that can help.

Riggs

Jud Chapin

This has been covered in detail fairly recently. Do a search and you'll find what you are looking for.

riggs 74

In my search I could not find a direct answer to my question, If you know which thread, please share.

Still looking for the answer.

Riggs.

Peterbuilt

To bypass: at the orange push to start button on the passengers side firewall
jumper 12 lt green/black to 12 purple.

riggs 74

Thanks Pete, I have seen this diagram in a few post but I am still unclear on the answer to my question. I am eliminating all of the interlocks except for the neutral safety switch and want to confirm that the purple wire at the neutral safety switch is the wire that switches hot with the key to start position. I see in the diagram that the purple connects to the green and then the green comes back inside the cabin and I believe eventually splices back into the purple at the neutral safety switch, Is this correct? I just want to make sure before I splice my ECU start lead into the purple wire at the neutral safety switch.

Thanks for any and all help you can bring.

Riggs

Peterbuilt

You described the wiring correctly.
Turning the key switch to"Start" sends 12 volts to the NSS then to the "S" terminal on the starter.

riggs 74

Thanks Pete, I just wanted to be sure.


Riggs