Join Date: Mar 2016
Location: Lake Mary, Florida
Re: Help with locating potential harness wire location
Went through this myself just recently. My 67 started its life as a 6 cylinder, 2 speed Powerglide automatic, with a column shift setup. During one of its previous owners, it got a 327 V8, and a 3 speed automatic, and a floor shift (67 shifter) and a floor console. I found that the steering column nuetral safety switch was removed, and the reverse lights (red/gree) where dangling, but the two purple wires were spliced, allowing the engine to start in any gear.
I made my own harness, consisting of two 12 gauge purple wires, one red 18 gauge wire, and one 18 gauge green wire, heat shrinked the entire 4 foot length of these wires, then ran it to the console shifter, where the "correct" 3 speed automatic transmission neutral safety switch was installed on the shifter. It now works as it should.
And a tip to removing the large, monolith factory radio is to remove the cardboard glovebox; this gains you easy access to the radio. You can then pull it out from the glovebox opening.
Amazes me as to how previous owners wired these cars in the past. More amazed as to how many survived the crazy unsafe wiring they got!
Never argue with an idiot; they'll only drag you down to their level, then beat you with experience.