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Click on image for the lowdown. 
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| | Forums66 Topics128,052 Posts1,055,726 Members48,426 | | 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
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Jul 2008 Posts: 1,262 Shop Shark | | Shop Shark Joined: Jul 2008 Posts: 1,262 | I believe the brown wire that is common to both the left and right side tail lights is the wire that is used to power the license plate light. This wiring diagram confirms the brown wire: http://67-72chevytrucks.com/vboard/showthread.php?p=2955936Dark green would be for the right side turn signal indicator. Hope this helps :-) | | |
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