make sure the lower part of the upper column is turned in the park position
So, what's the problem here? You want/need an actual NSS that doesn't work off the column? The aftermarket shifter has a switch for it and you need to wire it up?
1- figure out the switch configuration on the shifter (normally open or normally closed)
2- cut the purple starter wire at the ignition switch
3- put the ends to 87 & 30 of a good quality 5 pin relay
4- use the switch in the shifter to engage the relay to allow start (85 or 86 to ignition and a ground coming from the shifter switch.
Done.
Extra craftiness bonus points for hiding a starter disable switch inline with the shifter switch.
There is no start relay on a G body, so the actual shift mechanism in the column interrupts the starter in the ignition switch itself. SO, if you want it to work, you need the backdrive linkage from the shift pawl on the trans up to the column. Or, you can wire your own in the way I described.
Im not positive but isnt the neutral safety switch is more of a mechanical interlock that keeps the key from turning the ignition switch all the way except for in park or neutral, rather than an electrical interruption. if the mechanical parts have all been removed there is no need to back drive it off of the transmission linkage. if you want it to start only on park or neutral cut the purple wire and wire it to your switch on the shifter
Hence the need for the 5 pin relay.......That would make sense but the wire going from the bulkhead connector to the starter is 12GA. The micro switch for the shifter looks like its pretty light duty. The reverse light wires going to the second micro switch and the indicator light wires are only 18GA.
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