Reverse lights - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GM man · 03-13-2018, 10:01 PM

I'm trying to figure out what the mechanism is that makes the reverse lights come on and where it is. I've installed a back up camera and wired it to my reverse lights, but I have to hunt around with the gear shift to get the reverse lights to come on, like the switch is worn out or something. Thanks for any help.

rockyrivermark · 03-13-2018, 10:06 PM

It's part of the nuetral l safety switch located on the lower part of the steering shaft by the floor.
Hope that helps.
Mark

custom10nut · 03-13-2018, 10:29 PM

One of two things.
Your switch, on the lower steering column is loose, or out of adjustment.
If loose, turn the it key to run, put your shifter in reverse, move the switch left or right until the backup lights come on, then tighten the switch down.
Adjusting is the same but you just have to loosen the switch to begin.

GM man · 03-15-2018, 12:32 AM

fantastic! thanks fellas

BigMike56-72 · 03-15-2018, 11:29 AM

The reverse lights are wired to your NSS as stated by others. The wires are green and should be on your steering column. If they dont come on when you go into reverse you have to move the NSS left or right and try again. I just went through this not to long ago. Here is a diagram I found that helped me out. You can also look at my post to see if there's anything there that might help you as well. Good luck.

http://67-72chevytrucks.com/vboard/s...d.php?t=755946

Mike

zosoppp · 03-15-2018, 11:47 AM

Also if it's a manual with three on the tree there are just the two green wires on the steering column switch (no NSS).

If it's three or four (or more) on the floor then the reverse switch is likely on the transmission or shifter mechanism under the cab floor and the two green wires go through the bulkhead connector to the engine harness.

External · 12-31-2018, 08:17 PM

Which one is it. The one dangling not connected to anything?
Or the one mounted to the firewall.
Mine used to be a 3 speed- now it's an automatic. I dont know exactly how messed up this is.
My reverse light bulbs were not in the sockets when I got it. I put them in and now they come on all the time.

tino0217 · 01-17-2019, 04:17 AM

Is it possible to have it on the steering column even though it is a 4 speed manual?

03-13-2018, 10:01 PM	#1
GM man Registered User Join Date: Aug 2011 Location: Gainesville, Texas Posts: 127	Reverse lights I'm trying to figure out what the mechanism is that makes the reverse lights come on and where it is. I've installed a back up camera and wired it to my reverse lights, but I have to hunt around with the gear shift to get the reverse lights to come on, like the switch is worn out or something. Thanks for any help. __________________ 1972 GMC Jimmy 6.0/4L65 1972 Chevrolet long bed 1/2 ton

03-13-2018, 10:06 PM	#2
rockyrivermark Registered User Join Date: Apr 2011 Location: Fairview Park, Ohio Posts: 1,031	Re: Reverse lights It's part of the nuetral l safety switch located on the lower part of the steering shaft by the floor. Hope that helps. Mark __________________ My build page http://67-72chevytrucks.com/vboard/s...d.php?t=764662 My cabinet building site http://www.cbcabinets.com

03-13-2018, 10:29 PM	#3
custom10nut Registered User Join Date: Apr 2015 Location: East Tn (In the heart of the Smoky Mtns) Posts: 1,893	Re: Reverse lights One of two things. Your switch, on the lower steering column is loose, or out of adjustment. If loose, turn the it key to run, put your shifter in reverse, move the switch left or right until the backup lights come on, then tighten the switch down. Adjusting is the same but you just have to loosen the switch to begin.

03-15-2018, 12:32 AM	#4
GM man Registered User Join Date: Aug 2011 Location: Gainesville, Texas Posts: 127	Re: Reverse lights fantastic! thanks fellas __________________ 1972 GMC Jimmy 6.0/4L65 1972 Chevrolet long bed 1/2 ton

03-15-2018, 11:29 AM	#5
BigMike56-72 Registered User Join Date: Jul 2016 Location: Los Angeles/SGV Posts: 74	Re: Reverse lights The reverse lights are wired to your NSS as stated by others. The wires are green and should be on your steering column. If they dont come on when you go into reverse you have to move the NSS left or right and try again. I just went through this not to long ago. Here is a diagram I found that helped me out. You can also look at my post to see if there's anything there that might help you as well. Good luck. http://67-72chevytrucks.com/vboard/s...d.php?t=755946 Mike Attached Images

03-15-2018, 11:47 AM	#6
zosoppp Registered User Join Date: Mar 2014 Location: Lincoln Park, NJ Posts: 193	Re: Reverse lights Also if it's a manual with three on the tree there are just the two green wires on the steering column switch (no NSS). If it's three or four (or more) on the floor then the reverse switch is likely on the transmission or shifter mechanism under the cab floor and the two green wires go through the bulkhead connector to the engine harness. __________________ 1970 C10 LWB 350SBC, SM330 Muncie (not saginaw SM326) (on tree), 3.07 open (assumed), PS, PB, Idiot lights

12-31-2018, 08:17 PM	#7
External Registered User Join Date: Jun 2018 Location: Louisiana Posts: 185	Re: Reverse lights Which one is it. The one dangling not connected to anything? Or the one mounted to the firewall. Mine used to be a 3 speed- now it's an automatic. I dont know exactly how messed up this is. My reverse light bulbs were not in the sockets when I got it. I put them in and now they come on all the time. Attached Images __________________ '72 Chevy Custom Deluxe Highlander. Med Olive/White 350/200 ps,pb and Air Conditioning!

01-17-2019, 04:17 AM	#8
tino0217 Registered User Join Date: May 2017 Location: Seatac, wa Posts: 172	Re: Reverse lights Is it possible to have it on the steering column even though it is a 4 speed manual?



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