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Andy4639 · 05-18-2017, 12:14 PM

I sure sounds like it. Most housing do ground though them selves. Are you sure the black wire is a ground and not just acting as one? What I mean is if the housing isn't grounded good the wire could be acting as a ground.
I found this on Speedway parts site.

Notes

Note: Due to the 1-piece backing plate design and factory crimped bezel, the bulbs in these taillights are not easily replaceable. Slight bending of the bezel may be required to remove the lens to access the bulb/socket area.

Wiring Code (OLD and NEW versions):
•3-Wire Housing
◦White wire = Ground
◦Black wire = taillight
◦Green wire = Stop/turn

•2-Wire Housing ◦White wire = Stop/turn
◦Black wire = taillight
◦Ground the housing

05-18-2017, 12:14 PM	#2
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Two wire tail light help? I sure sounds like it. Most housing do ground though them selves. Are you sure the black wire is a ground and not just acting as one? What I mean is if the housing isn't grounded good the wire could be acting as a ground. I found this on Speedway parts site. Notes Note: Due to the 1-piece backing plate design and factory crimped bezel, the bulbs in these taillights are not easily replaceable. Slight bending of the bezel may be required to remove the lens to access the bulb/socket area. Wiring Code (OLD and NEW versions): •3-Wire Housing ◦White wire = Ground ◦Black wire = taillight ◦Green wire = Stop/turn •2-Wire Housing ◦White wire = Stop/turn ◦Black wire = taillight ◦Ground the housing __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.