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Click on image for the lowdown. 
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| | | Forums66 Topics128,034 Posts1,055,540 Members48,425 | | 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: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | This wiring diagram for the '40 does not show a horn relay. Apparently they were used in some years, and not in others. http://chevy.tocmp.com/chevywiring/pdf/40truck.pdf | | |
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