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Neutral safety switch
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ACESN8S
Posted 2018-10-16 7:59 PM (#571812)
Subject: Neutral safety switch



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Posts: 238
10010025
Location: Westminster, Colorado
OK I just installed a NOS neutral safety switch
On my 58/ 325 poly car
It was engaging the starter when I would
Try and go into neutral. And now it’s doing the
Same thing ,,?
Any tips on where to figure out what’s going on ?
I have a guy flying in from Australia on Saturday
To buy it , I want to get it right for him.
I’ve been used to shutting off the car then
Going I to neutral, but that’s not right !!!

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ACESN8S
Posted 2018-10-16 8:28 PM (#571817 - in reply to #571812)
Subject: Re: Neutral safety switch



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Posts: 238
10010025
Location: Westminster, Colorado
Oh yea it’s has a OFFY 6 pack intake
I’m not sure I have the correct port being used
Does it use vacuum or pressure ?
The port I’m using just goes into a runner ?
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Powerflite
Posted 2018-10-16 8:59 PM (#571819 - in reply to #571812)
Subject: Re: Neutral safety switch



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Posts: 4825
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Location: So. California
Just use an ohm-meter to see if it is closed while the motor is running. If it is, then your NOS switch is bad. Yes it is supposed to switch open when a vacuum is applied through one of the runners.
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56D500boy
Posted 2018-10-16 9:09 PM (#571821 - in reply to #571812)
Subject: RE: Neutral safety switch



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Posts: 3857
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Location: Lower Mainland BC
I guess you missed the write-up I did on Neutral Safety switches on Sept. 21 (a few weeks ago):

I suggest you have read through it. The switch on the intake manifold uses vacuum to sense that the engine is running.

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=69708&...



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ACESN8S
Posted 2018-10-17 9:24 PM (#571879 - in reply to #571812)
Subject: Re: Neutral safety switch



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Posts: 238
10010025
Location: Westminster, Colorado
Thanks, very helpful ??
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ACESN8S
Posted 2018-10-17 10:07 PM (#571882 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
OK the switch operates correctly,,BUT I’m still able to engage the starter when the engine
Is running . I checked the wire from the switch to the relay for possible shorts
And re ran a new one just to check,, same thing ??
What gives !!
Any suggestions , I looked through your earlier post but I’m seeing anything that may cause
The problem
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ACESN8S
Posted 2018-10-17 10:08 PM (#571883 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
Also my switch is the two prong style, like the pictured at the bottom of your post,
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ACESN8S
Posted 2018-10-17 10:23 PM (#571884 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
OK I see there may be another stitch in the tranny
I was only looking at the vacuum switch on the intake .
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ACESN8S
Posted 2018-10-19 2:50 PM (#571986 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
OK now I’m confused ? I installed a new SNS on the tranny
Same thing ? Then I completely unhooked the ground
Wire from the starter relay .. it still started ????
So now I’m thinking the relay is bad !!!???
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56D500boy
Posted 2018-10-19 7:37 PM (#571997 - in reply to #571986)
Subject: Re: Neutral safety switch



Expert

Posts: 3857
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Location: Lower Mainland BC
ACESN8S - 2018-10-19 2:50 PM

OK now I’m confused ? I installed a new SNS on the tranny
Same thing ? Then I completely unhooked the ground
Wire from the starter relay .. it still started ????
So now I’m thinking the relay is bad !!!???


SO to be clear, the Neutral Safety Switch you installed looks like this?:



And the two pin vacuum switch looks like this?:



And the starter solenoid is a *FOUR* terminal solenoid, like this one?



And it is hooked up something like this?:



*AND* you have push button starter switch (activated when you push the "N" (neutral) button on the trans shift pad, similar to this one:



And everything is hooked up correctly?


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ACESN8S
Posted 2018-10-19 7:54 PM (#571999 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
Yes !
I purchased a new solinoid and wired it the same as the old one
And it doesn’t work ?
Now I’m trying to figure out it’s wired correctly
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ACESN8S
Posted 2018-10-19 8:16 PM (#572000 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
yes I rechecked the wiring
And I think the issue was I didn’t have the solinoid grounded
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ACESN8S
Posted 2018-10-19 8:32 PM (#572002 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
It turns over now
I’ll try and start it later, I have the float out of the tank now
I’m replacing it , then I’ll see if it does or doesn’t turn over
When it’s started.
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ACESN8S
Posted 2018-10-19 8:45 PM (#572003 - in reply to #571812)
Subject: Re: Neutral safety switch



Veteran

Posts: 238
10010025
Location: Westminster, Colorado
Yay it works !!
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Leadfoot1000
Posted 2018-10-23 2:52 PM (#572229 - in reply to #571812)
Subject: Re: Neutral safety switch



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Posts: 209
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Location: Southern CA
FYI on a related topic, starter relays. I had a problem with my starter staying engaged after the car started. The relay was bad, I replaced it twice with $10 relays from “Vans Auto on epay, same problem. Then I replaced it with a Standard Motor Products relay, and the problem went away.

Edited by Leadfoot1000 2018-10-23 2:54 PM
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