Neutral Safety Switch Wiring Oddity
4th Gear
Joined: May 2017
Posts: 4
Likes: 0
wiring
This might be difficult to understand but I'll try.
During "testing" (not guessing) if one of our members is asking for help and goes to the switch and puts a 12v test light on the exposed terminal of the purple/white and the test light fails to light he is going to assume at that point there is no power coming from the ignition switch because he was testing the WRONG wire.
We've all experienced these little wrong turns while diagnosing an electrical problem ,which for some of us is a momentary hmmm but for a rookie it can have him dropping the steering column to inspect the ignition switch and then "Corvette electrical system overload".
During "testing" (not guessing) if one of our members is asking for help and goes to the switch and puts a 12v test light on the exposed terminal of the purple/white and the test light fails to light he is going to assume at that point there is no power coming from the ignition switch because he was testing the WRONG wire.
We've all experienced these little wrong turns while diagnosing an electrical problem ,which for some of us is a momentary hmmm but for a rookie it can have him dropping the steering column to inspect the ignition switch and then "Corvette electrical system overload".
any help appreciated
Paul
Team Owner
Joined: Sep 2006
Posts: 31,235
Likes: 4,326
From: Westminster Maryland
Hi Paul,
Welcome!
First Post! I'm glad you're here!
I believe you'll find that the 12 gauge purple wire runs to the solenoid on the starter in one direction, and to the ignition switch in the other.
Regards,
Alan
Welcome!
First Post! I'm glad you're here!
I believe you'll find that the 12 gauge purple wire runs to the solenoid on the starter in one direction, and to the ignition switch in the other.
Regards,
Alan
4th Gear
Joined: May 2017
Posts: 4
Likes: 0
Thanks, i cant work out why it starts in gear when the switch is open...any ideas?
4th Gear
Joined: May 2017
Posts: 4
Likes: 0
cheers
Paul
4th Gear
Joined: May 2017
Posts: 4
Likes: 0
will check ignition switch tomorrow, getting late here in Australia
thanks
Race Director
Joined: Jan 2007
Posts: 10,673
Likes: 696
From: Danville Illinois
2025 Corvette of the Year Finalist - Modified
2024 C3 of the Year Winner - Modified
2021 C3 of the Year Finalist - Modified
2019 C3 of Year Finalist (appearance mods)
Some people can get really creative and create a wiring disaster.
Cruising
Joined: Feb 2018
Posts: 14
Likes: 0
From: Dracut Ma
Hello All,
I am glad I found this post. I am having some difficulty with my NSS on a 1975. Took apart the shifter and notice some cut wires. The PO put in an inline 20 amp fuse. Fuse was blown. Replaced it and she started right up. Problem now is it continues to blow once I shift to N. Checked the wiring but do not see anything out of the ordinary. But then again I'm learning. Why bypass the switch?
I am glad I found this post. I am having some difficulty with my NSS on a 1975. Took apart the shifter and notice some cut wires. The PO put in an inline 20 amp fuse. Fuse was blown. Replaced it and she started right up. Problem now is it continues to blow once I shift to N. Checked the wiring but do not see anything out of the ordinary. But then again I'm learning. Why bypass the switch?
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Brett Foote
Intermediate
Joined: Jul 2019
Posts: 25
Likes: 1
From: Austin, TX
I know this is an old thread but can someone tell me why the NSS has power coming in from both the blinker/reverse circuit AND the gauge hot circuit? In my head it's so the seatbelt buzzer will still work if the blinker fuse is blown but it seems like that would also mean that the reverse lights could be powered from the gauge circuit?
