Simple Neutral Safety switch

[Bones Jackson]

Can anyone help with hooking up a neautral safety switch on a pretty much stripped race car? I have the one wire coming off my 727, center post. Can I splice this into the starter solenoid wire? I do not have any of the original relays or wiring in this car. I waited till the last minute to address this and racing season starts in two weeks. Thanks

 

[bigmanjbmopar]

The center post is basically a ground cut off for the starter relay so if in gear it would cut the negative to the starter via the relay so it would not start. If you no longer have the starter relay you would just series in the center post on the NSS with power going to your starter like a light switch. Do not use the other posts if you have the 3 post NSS I believe the casing is used as a ground reference as well.

 

[Bones Jackson]

bigman, would this work if I spliced it in?


solenoid wire__________________Starter
/
/
/
Safety switch wire from trans

 

[Bones Jackson]

Hard to draw it ou but, I was thinking just splicing the nss into the middle of the solenoid wire.

 

[HEMI-ITIS]

What are you now using for a starter relay??

 

[Bones Jackson]

Not using one. I'm just looking for a simple way to wire a nss. I could possibly put a micro switch on the shifter and wire the solenoid wire through it. Not sure if a micro switch would burn up though.

 

[Polara Pat]

Not using one. I'm just looking for a simple way to wire a nss. I could possibly put a micro switch on the shifter and wire the solenoid wire through it. Not sure if a micro switch would burn up though.

I'm pretty sure your starter should have some sort of relay between you key (push button) and the starter itself. That's a lot of draw to not have one.

 

[Bones Jackson]

I thought someone once said a solenoid only drew 7 or 8 amps.

Either way would it be possible to splice the one wire from the nss on the trans into the one wire going to the solenoid?

 

[bigmanjbmopar]

The starter does not get juice until you turn the key on, that is if you still have it wired that way and that is if you had a relay with it.

So the question is how is you car wired now to start? Key / button to starter?

I would do a y config at the NSS center post meaning wire that is going to solenoid now to NSS and then a wire from NSS to stater solenoid so if the wire that gives the solenoid power now gets to the NSS and the NSS is in park you should get power to the solenoid, if in gear and the NSS is working properly it will open cutting of the power to the solenoid. Test it out with temp wires and see.

HOWEVER - I would highly recommend a starter relay and wiring it correctly even if you just want to use a push button in stead of the key switch. The relay takes up a lot of current and would not hurt you race car by being in.

Also just one last thing, bear in mind the NSS only provides a ground for the starter relay and is not intended to be used as I have described, I have never seen it done but am interested to see if it works. Another route is a B&M Shifter with micro switch built in

 

[Bones Jackson]

OK, thats what I wan wondering. If I spliced the single wire from the neutral switch into the starter solenoid wire like a Y or a T will the neutral safety switch work. I'll give it a whirl tonight and see what happens. Thank you

 

[bigmanjbmopar]

Just an FYI if you blow up it's not my fault ;)

 

[mobileparts]

Neutral Safety Switches

The 1963 - 1968 A/T Neutral Safety Switch is a 1- wire switch...
The 1969 - '80s A/T Neutral Safety Switch is a 3 - wire switch....

I have them both in stock if you need...........
Best to call me --- Craig -- 516 - 485 - 1935.....new York....

 

[moparpoor]

I run a switch off the shifter as an interupter for the ignition switch.Some shifters you can purchase nss for them,as I did with mine.