Reverse light wiring ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

67 chevelle · 12-16-2015, 09:55 AM

I took out a 4 on the floor from a 67 , cant find the reverse switch wires , there is a yellow/orange and white wire coming from the bottom of the fuse panel , could that be it

68panelman · 12-16-2015, 10:30 AM

The yellow and white are for your interior cab light. The reverse lights "I believe" are purple and blue? and would be by your 4 spd coming from the firewall. If it still has the sm420 trans, its a one and last year deal for the reverse lights.

67 chevelle · 12-16-2015, 11:10 AM

I found a 4 spade connector with a green and black coming off but dont know were it splices in harness , which wire going to the back powers the reverse lights ?

ray_mcavoy · 12-16-2015, 05:57 PM

The reverse light wires should be dark and light green.

The dark green wire is the power feed that runs from the fuse box to the switch. Then the light green wire goes from the switch back to the lights.

With the 4-speed trans, those dark & light green wires both run through the engine harness bulkhead connector on the firewall. That takes them outside the cab and to a 2-terminal plug that connects to the switch on the trans. Inside the cab, the light green wire just runs a short ways from the engine harness bulkhead connector over to the rear light harness connector. And from there runs to the back of the truck.

67 chevelle · 12-17-2015, 08:23 AM

Quote:

Originally Posted by ray_mcavoy

The reverse light wires should be dark and light green.

The dark green wire is the power feed that runs from the fuse box to the switch. Then the light green wire goes from the switch back to the lights.

With the 4-speed trans, those dark & light green wires both run through the engine harness bulkhead connector on the firewall. That takes them outside the cab and to a 2-terminal plug that connects to the switch on the trans. Inside the cab, the light green wire just runs a short ways from the engine harness bulkhead connector over to the rear light harness connector. And from there runs to the back of the truck.

Thank you so much , this solves my issue , I believe these wires are next to each other on the engine side firewall block , top right side , looking at it from the grill side , on my truck

67 chevelle · 12-17-2015, 10:11 AM

Up and running , thank you , Ray

midniteblues · 12-17-2015, 05:51 PM

Here is a pic of the plug for a granny 4 reverse lite switch mine was located going down behind the passenger cly head
It's the one in front.

12-16-2015, 09:55 AM	#1
67 chevelle Registered User Join Date: May 2013 Location: WEST PALM FLORIDA Posts: 1,174	Reverse light wiring ? I took out a 4 on the floor from a 67 , cant find the reverse switch wires , there is a yellow/orange and white wire coming from the bottom of the fuse panel , could that be it __________________ 68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive

12-16-2015, 10:30 AM	#2
68panelman Registered User Join Date: Jan 2011 Location: Delaware and Long Island, New York Posts: 3,458	Re: Reverse light wiring ? The yellow and white are for your interior cab light. The reverse lights "I believe" are purple and blue? and would be by your 4 spd coming from the firewall. If it still has the sm420 trans, its a one and last year deal for the reverse lights.

12-16-2015, 11:10 AM	#3
67 chevelle Registered User Join Date: May 2013 Location: WEST PALM FLORIDA Posts: 1,174	Re: Reverse light wiring ? I found a 4 spade connector with a green and black coming off but dont know were it splices in harness , which wire going to the back powers the reverse lights ? __________________ 68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive

12-16-2015, 05:57 PM	#4
ray_mcavoy Registered User Join Date: Nov 2009 Location: Sherman, ME Posts: 2,366	Re: Reverse light wiring ? The reverse light wires should be dark and light green. The dark green wire is the power feed that runs from the fuse box to the switch. Then the light green wire goes from the switch back to the lights. With the 4-speed trans, those dark & light green wires both run through the engine harness bulkhead connector on the firewall. That takes them outside the cab and to a 2-terminal plug that connects to the switch on the trans. Inside the cab, the light green wire just runs a short ways from the engine harness bulkhead connector over to the rear light harness connector. And from there runs to the back of the truck.

12-17-2015, 10:11 AM	#6
67 chevelle Registered User Join Date: May 2013 Location: WEST PALM FLORIDA Posts: 1,174	Re: Reverse light wiring ? Up and running , thank you , Ray __________________ 68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive

12-17-2015, 05:51 PM	#7
midniteblues Registered User Join Date: Jul 2011 Location: strausstown pa Posts: 3,394	Re: Reverse light wiring ? Here is a pic of the plug for a granny 4 reverse lite switch mine was located going down behind the passenger cly head It's the one in front. Attached Images __________________ 81 camaro 355 4/spd 342 posi my first love. 67 swb step 454/4spd ott 373 posi 4/7 drop. 2000 s10 zr2 little blue truck that never gets stuck. '74 heald super bronc vt8. tecumseh powered moon rover.



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