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Click on image for the lowdown. 
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| | | Forums66 Topics128,087 Posts1,055,999 Members48,430 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | try this diagram - if you've got 3 wires and 12V, you no longer have a stock setup, so you're the only one who can figure it out - start tracking wires .... with the single tail light there should be one wire for the running light, and one wire for the brake light - there should only be a voltage reading on either of them when the brakes/lights are on Bill | | |
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