68 to 69 column Swap, reverse lights wiring?

[Stringbender]

Hey guys, just took my column out to rebuild this spring. Put a 69 column in for now so I can take my time on the rebuild an still cruise the car around. The transmission is a 73 with a 3 pin neutral safety switch (which was not wired up to anything, connector plug MIA). I bought a 3 pin plug & pigtail. My question is how to wire this to have neutral safety an most importantly my reverse lights Back. Ill connect Center pin Brown/yellow wire to starter relay....Confused beyond that because the back up lamp switch plugs into 2 violet wires an works off a ground to activate the reverse lights....Right? I know I'm over thinking this, but this is my first 68 and I was totally clueless to the fact that 68's had this "external" back up lamp switch. Till I was under the dash unbolting the column. Any help would be greatly appreciated. Thanks

[Nacho-RT74]

the 3 pins NSS feeds ground to close circuit at starter relay from center pin taken from same tranny chassis.

the 2 outer pins are the + in and out, no matter which one. I guess the steering column switch is the same principle, getting two prongs to get +12 and feed +12 when in reverse up to bacvk up lights. You just have to feed both NSS outer pins with the same wires reaching the reverse switch at column.

On earlier years of the NSS setup, the wires for reverse signal at Tranny harness were black and black traced white for these pins ( and of course, brown traced yellow for the ground relay ). Inside the cab they were actually white and white traced black. The solid color ( inside and outside the cab ) was the power from fuse box in ACC, and the traced color was the activated signal for the reverse light. On body rear harness this traced wire become on violet.

Then on laters ( since mids 70s ) and some replacement pigtails, the traced wire was replaced for the violet to match the body rear harness.

This color setup is just for correctness, but actually can be spliced in any order, because allways will work while one of the outer NSS pins gets the + signal from fuse box with key in ACC, and the other one runs up to the rear lights

[Stringbender]

Ok Great Thank you that makes sense. Let me also Thank YOU for all the help you have given me an never knew it! A couple years ago I bought a 73 rallye charger that somebody had bought from "Pick N Pull". After getting it running & Driving again. It had to pass the dreaded DMV break & light inspection. I had to get EVERY light, horn, buzzer etc working and DID only with help I found from posts of yours here an the B body forum. My nickname for that car was actually the Nacho charger. Because with only basic electrical skills I never woulda been able to track down all electrical problems it had. So Thanks AGAIN, really cool!

[Nacho-RT74]

wow!!! LOL, the Nacho Charger LOL... a son I never met LOL

[Lennard]

wow!!! LOL, the Nacho Charger LOL... a son I never met LOL

[Stringbender]

Ha ha ya man thank you for real. It was by no means a restoration but was very cool to take it from junkyard to bad ass daily driver. So cool guys take time out of their lives to help other guys they don't even know work on these cars!