Backup switch help 72 auto
Thread Starter
Racer
Joined: Apr 2009
Posts: 393
Likes: 0
From: Holcomb Mississippi
Backup switch help 72 auto
All,
I recently removed the dash harness and checked every wire for continuity. All were reading correctly so I decided to keep the harness and save a few bucks. However, there is a connection under the center console with a pink and green wire that does not have anything to connect to (picture 1). On the Doc's rebuild diagram, it lists this connection as the backup switch conn. (picture 2). This is an automatic 72. In the AIM, I believe I have found the connection for it but it is taped to the wiring harness (picture 3). Does this mean it wasn't connected? I also do not have any backup lights. What am I missing?
Picture 1
Picture 2
Picture 3
I recently removed the dash harness and checked every wire for continuity. All were reading correctly so I decided to keep the harness and save a few bucks. However, there is a connection under the center console with a pink and green wire that does not have anything to connect to (picture 1). On the Doc's rebuild diagram, it lists this connection as the backup switch conn. (picture 2). This is an automatic 72. In the AIM, I believe I have found the connection for it but it is taped to the wiring harness (picture 3). Does this mean it wasn't connected? I also do not have any backup lights. What am I missing?
Picture 1
Picture 2
Picture 3
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
An automatic has a neutral safety switch which turns on back up lights when the shifter is in "R".
http://www.nrjvette.com/johdotukset/...tte%201972.pdf
http://www.nrjvette.com/johdotukset/...tte%201972.pdf
Thread Starter
Racer
Joined: Apr 2009
Posts: 393
Likes: 0
From: Holcomb Mississippi
Neutral Safety Switch
Does anyone have a picture of the neutral safety switch for an auto? I did a search and found a post by Easy Mike stating it was located under the center console but this 72 is missing one.
Instructor
Joined: Oct 2005
Posts: 204
Likes: 4
From: Sunny Florida
back up switch
Andycw
I believe it is the same as a '71 automatic.
I think you would find it under the shift mechanism after removing the top console plate.
From my 71 AIM the wire color codes and the one I removed are the same so it would be a start.
I can send a picture of the one I removed if it helps
It is also listed as a neutral safety/backup light switch in the catalogs.
Steve :thumbs:
I believe it is the same as a '71 automatic.
I think you would find it under the shift mechanism after removing the top console plate.
From my 71 AIM the wire color codes and the one I removed are the same so it would be a start.
I can send a picture of the one I removed if it helps
It is also listed as a neutral safety/backup light switch in the catalogs.
Steve :thumbs:
Thread Starter
Racer
Joined: Apr 2009
Posts: 393
Likes: 0
From: Holcomb Mississippi
a start
All,
Forgive me. The DARK green/pink wire combo I was looking at in picture 1 is for the seatbelt warning. I do have a neutral safety switch. How can I test it to see if it works properly as my backup lights do not work. I have it hooked up as shown in this picture.
Curious though, and forgive my ignorance, why is the pink wire hooked to the LITE green and the LITE green to the pink?
Steve, Thanks for the help.
Forgive me. The DARK green/pink wire combo I was looking at in picture 1 is for the seatbelt warning. I do have a neutral safety switch. How can I test it to see if it works properly as my backup lights do not work. I have it hooked up as shown in this picture.
Curious though, and forgive my ignorance, why is the pink wire hooked to the LITE green and the LITE green to the pink?
Steve, Thanks for the help.
Le Mans Master
Joined: Aug 2006
Posts: 7,426
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Hi again,
The pink brings 12 volts to the switch and the Lt green brings it to the lights.
Is your NSS new? I heard some new ones have the colors wrong.
The pink brings 12 volts to the switch and the Lt green brings it to the lights.
Is your NSS new? I heard some new ones have the colors wrong.
Le Mans Master
Joined: Aug 2006
Posts: 7,426
Likes: 1,559
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
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Last edited by Easy Mike; May 2, 2012 at 08:20 AM.
Thread Starter
Racer
Joined: Apr 2009
Posts: 393
Likes: 0
From: Holcomb Mississippi
Thanks Easy Mike
I found the switch, just ignorance on my part. But, as stated above, why are the wires crossed over when hooked up? Is this correct and how can I test the switch to determine if its defective?
