72 Super Cheyenne light problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

outlaw005 · 09-09-2007, 01:16 AM

Missing all rear lights including back up lights. All fuses check good. Any ideas on what the problem is? Thanks

Walts_restoration · 09-09-2007, 01:19 AM

tested voltage to tailights? could be a cracked wire.

RyanG · 09-09-2007, 02:57 AM

Had that issue and found that the wires coming through the firewall were seperated......however I still do not have reverse lights.I haven't really put that on my immediate fix list. Until I get a ticket for it/

blukangoo · 09-09-2007, 03:03 AM

In my 68 I have another connector in the back. My reverse lights didn´t want to work either. I cleaned that connector and they worked fine.

Longhorn Man · 09-09-2007, 10:33 AM

there is a plug ont eh firewall, and one under the bumper, actually at the rearmost crossmember, either of those could be unpludgged, but it isn't likely.
I would start with grounds. Has the been just been installed, and/or does it have a wooden floor?

smoked68 · 09-09-2007, 10:50 AM

I had the same type problem a few weeks ago. It was a ground issue. Took the light assemblies out on both rears sanded the back of the housings and then the truck frame where they screw to the frame. All started working as they should then. Good luck.

68gmsee · 09-09-2007, 11:43 AM

Also, don't forget the reverse lights switch on the steering column...

raws67 · 09-09-2007, 04:22 PM

About one month ago I bought an engine down by LA and was driving back from LA over the grapevine and I had no tail lights in the dark, not a place you want to be without lights. After scratching my head and calling a buddy with a wiring diagram I climbed underneath and followed the harness down the frame and there it was the round plug near the rear bumper I believe it was along the drivers side frame close to where they hang rear tires on newer trucks. The harness came loose just enough to still be hooked up but not make contact. If all your rear lights are out then that would be my best guess. Good luck

09-09-2007, 01:16 AM	#1
outlaw005 Registered User Join Date: Sep 2007 Location: Seattle wa Posts: 1	72 Super Cheyenne light problem Missing all rear lights including back up lights. All fuses check good. Any ideas on what the problem is? Thanks

09-09-2007, 01:19 AM	#2
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	Re: 72 Super Cheyenne light problem tested voltage to tailights? could be a cracked wire. __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

09-09-2007, 02:57 AM	#3
RyanG Registered User Join Date: Feb 2006 Location: Gilbert, Az Posts: 180	Re: 72 Super Cheyenne light problem Had that issue and found that the wires coming through the firewall were seperated......however I still do not have reverse lights.I haven't really put that on my immediate fix list. Until I get a ticket for it/

09-09-2007, 03:03 AM	#4
blukangoo Neighborhood Pickle Slinger Join Date: Jan 2007 Location: Cadolzburg, Bavaria, Germany Posts: 2,224	Re: 72 Super Cheyenne light problem In my 68 I have another connector in the back. My reverse lights didn´t want to work either. I cleaned that connector and they worked fine. __________________ -------------------------------------------------- My C10 Diary Our cars: 1966 Chevrolet Chevelle 396 - TH350 1968 Chevrolet C10/CST 327 TH400/375 1969 Corvette Stingray 350 - Muncie Manual Trans 1969 Chevrolet ElCamino 350 - TH400 1970 Cutlass Supreme Convertible - 350 Rocket - TH350 1973 Camaro LT - New Engine Done - TH350 1973 Corvette Convertible 454 - TH400

09-09-2007, 10:33 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: 72 Super Cheyenne light problem there is a plug ont eh firewall, and one under the bumper, actually at the rearmost crossmember, either of those could be unpludgged, but it isn't likely. I would start with grounds. Has the been just been installed, and/or does it have a wooden floor?

09-09-2007, 10:50 AM	#6
smoked68 Registered User Join Date: Oct 2006 Location: Rock Hill, SC Posts: 421	Re: 72 Super Cheyenne light problem I had the same type problem a few weeks ago. It was a ground issue. Took the light assemblies out on both rears sanded the back of the housings and then the truck frame where they screw to the frame. All started working as they should then. Good luck. __________________ 1968 chevy shortbed, Dark Shadow Gray 4 bolt 383 Stroker,Weiand Super Charger, disc brakes, 9 inch, 391 gear, 20" Eagle wheels, muncie 4 speed/ Hurst shifter, 4/7 drop, Hedman midlengths, 3 inch exhaust w/ 2 chamber flows. 1966 Mustang with 306 roller, c-4, 9 inch Detroit locker rear. 1965 Fastback Mustang w/347 stroker, top loader 4spd, 9 inch detroit locker. 1966 Mustang coup, 306 roller, c4, 9 inch. 65 Cobra, 427, T6oo, 9inch, of course. First gen Hayabusa, airbox mod and running 2 exhaust cams.. Zoom Zoom Zoom

09-09-2007, 11:43 AM	#7
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: 72 Super Cheyenne light problem Also, don't forget the reverse lights switch on the steering column...

09-09-2007, 04:22 PM	#8
raws67 Registered User Join Date: Jun 2007 Location: lemoore ca Posts: 126	Re: 72 Super Cheyenne light problem About one month ago I bought an engine down by LA and was driving back from LA over the grapevine and I had no tail lights in the dark, not a place you want to be without lights. After scratching my head and calling a buddy with a wiring diagram I climbed underneath and followed the harness down the frame and there it was the round plug near the rear bumper I believe it was along the drivers side frame close to where they hang rear tires on newer trucks. The harness came loose just enough to still be hooked up but not make contact. If all your rear lights are out then that would be my best guess. Good luck



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