Neutral Safety Switch

Discussion in 'Technical' started by 73dragmav, Feb 21, 2018.

  1. 73dragmav

    73dragmav Member

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    I am working on wiring the B&M Shifter into my '73 Mav. I got the BU lights to work perfectly and thought I had wired the NSS on the shifter the NSS wires at the column. Went to test the thing and it will start in any shifter position. I checked the switch and it is engaging/disengaging like it should but it was still cranking.

    I just spent the last 4 hours tracing everything as much as I could without untaping my entire harness to no avail. In a last ditch, 'for S&G' sort of thing, I cut the red/blue wire that is looped on the NSS side of the stock plug. Lo and behold, it will not crank in any gear. I did a quick search on here and found that the wire I cut is indeed the NSS wiring and I would assume I can connect each end of the wire to each side of my NSS and I should be good to go. Found that info here: http://mmb.maverick.to/threads/neutral-safety-switch-and-bu-light-switch.94380/

    My question now is: what do I need to do with the black/white and purple wires I will be disconnecting from my NSS (two wires at the end of the switch in the picture on the linked post)? Can I just cap them or remove them from the plug completely? Or do I need to splice them together? What do they even go to? I've pulled up a wiring diagram and I don't even see these wires on the diagram, only 4 wires shown at the NSS.

    Hopefully my rambling makes sense here, thanks for any help.
     
  2. Krazy Comet

    Krazy Comet Tom

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    Two wires are for the NSS the other two are backup lights... Apparently you tapped into the BL lights at another point, just cap them seperately...
     
  3. 73dragmav

    73dragmav Member

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    This is what I'll end up with, going to modify my wiring when I get home tonight. Not sure where the two capped wires go but if I don't need them, I won't worry too much about where they go. I had originally assumed they must be the NSS (since the other two wires were for the BU lights) and wired them up to my B&M NSS but they seem to do nothing.
     

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  4. groberts101

    groberts101 Member

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    Well there's your problem right there.. might still be grounded well enough but that's totally wrong spot to mount a neutral safety switch. Wet shoes might cause more issues too.

    Sorry.. couldn't resist. Use a circuit tester to verify keyed power cycles and good luck with it. :)
     
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  5. 73dragmav

    73dragmav Member

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    :rofl2:Thanks for the laugh! The handy thing right now is I do not have the transmission or starter in the car so I can test without worry about the thing lighting off in-gear. (and yes, the starter cable is completely disconnected so I don't burn the thing down either lol)
     

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