Automatic Transmission connection (Page 1/1) Cunnive FEB 28, 09:27 AM Hey folks - so I removed the entire engine wiring harness and found the transmissions harness connector in pretty bad shape. Here are my 2 questions 1) Where can I buy an entirely new wiring harness? 2) Where can I buy a new wiring hardness connector mounted onto the transmission? Much appreicated! olejoedad FEB 28, 09:34 AM The Neutral Safety Switch can be purchased new. You could repair the harness with by soldering in a new connector, or a used connector in good shape. cmechmann FEB 28, 08:08 PM You are going to be better off looking for another GM car with the same harness. That neutral safety switch was used on a lot of cars. Most popular would be GM A body. Century, Cutlass Cierra, Chevy Celebrity. Pomtiac 6000. Any with a 3sp auto should work. The Century and Cierra should be the same up to 1994. When I had to splice together a harness for my first swap, I raided a Cierra harness. From the transmission to the firewall connector. Most of the pins at the other end even matched. Don't forget the wire that goes down to the starter.