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Old 04-14-2020, 04:06 PM   #1
TheHeroicDevil
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i need help figuring out my neutral safety switch and reverse lights

My problem is my reverse lights come on in between neutral and reverse. I tried moving the safety switch to get it in line but it's not able to move anymore. also the truck is able to start in park and drive.
truck: 1972 chevy c20
engine 350
trans turbo350
neutral safety switch on the column
non-tilt column
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Old 04-14-2020, 04:08 PM   #2
TheHeroicDevil
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Re: i need help figuring out my neutral safety switch and reverse lights

do I try and replace the switch? if I do that I have to order one in because there are none in town
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Old 04-14-2020, 05:25 PM   #3
rockyrivermark
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Re: i need help figuring out my neutral safety switch and reverse lights

Install new switch then adjust and tighten up. Cheap and easy to do.
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Old 04-15-2020, 09:08 AM   #4
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Re: i need help figuring out my neutral safety switch and reverse lights

This link may help look at post 8. It is possible that your switch is not installed on the column properly. Or you may have the incorrect linkage on your transmission. Meaning that the switches range of movement isn't synchronized with the range of movement of the shifter input shaft on the transmission.

http://67-72chevytrucks.com/vboard/s...d.php?t=755946
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Old 04-15-2020, 12:43 PM   #5
toolboxchev
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Re: i need help figuring out my neutral safety switch and reverse lights

If your NSS starts in reverse and drive than the wiring may have been bypassed. The purple wire that runs the starter solenoid is most likely bypassed.

I would suggest to get a replacement from GMC Pauls. They are made exactly in the same place the originals were. Here in the US. I have had to replace a couple of them now, I did not get them from GMC Pauls.
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Old 04-15-2020, 11:02 PM   #6
TheHeroicDevil
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Re: i need help figuring out my neutral safety switch and reverse lights

Quote:
Originally Posted by toolboxchev View Post
If your NSS starts in reverse and drive than the wiring may have been bypassed. The purple wire that runs the starter solenoid is most likely bypassed.

I would suggest to get a replacement from GMC Pauls. They are made exactly in the same place the originals were. Here in the US. I have had to replace a couple of them now, I did not get them from GMC Pauls.
it starts in park and drive toolboxchev
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Old 04-15-2020, 11:03 PM   #7
TheHeroicDevil
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Re: i need help figuring out my neutral safety switch and reverse lights

Quote:
Originally Posted by HO455 View Post
This link may help look at post 8. It is possible that your switch is not installed on the column properly. Or you may have the incorrect linkage on your transmission. Meaning that the switches range of movement isn't synchronized with the range of movement of the shifter input shaft on the transmission.

http://67-72chevytrucks.com/vboard/s...d.php?t=755946
thanks for the info the truck does have a second non factory trans in it but it is still the tubro 350 the same as stock... the stock one let go
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Old 04-16-2020, 06:05 PM   #8
HO455
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Re: i need help figuring out my neutral safety switch and reverse lights

Toolboxchevy brought up a good point the switch may have been bypassed in the past. Likely the plug has a jumper of some kind. It could look fine but have a piece of wire or a paper clip jammed in it.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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