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Labor Day Putting down your wrenches or time for MORE wrenching? 
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| | | Forums66 Topics128,005 Posts1,055,261 Members48,418 | | 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!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Aug 2013 Posts: 59 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2013 Posts: 59 | I have a 1965 GMC Long bed step side with 4 headlight I have a new wiring harness to install on the headlight is the high beam on the inside or the out side With the high beans on do the low beam stay on also or do they go out
Bob May
| | | | | Joined: Sep 2011 Posts: 131 Shop Shark | | Shop Shark Joined: Sep 2011 Posts: 131 | The high beam lamps are the inner ones. When on high beam the brighter filliment in the outer lamp will also light making all four lamps light. The dimer filliment in the outer sealed beam is your low beam.
1 1955 Chev one ton. 261 engine
3 1962 Chev c-10 261 engine 4 1966 Plymouth VIP 5.7 GenIII Hemi 5 1966 Imperial Crown Coupe 440 engine | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | You will find that the bulbs will not fit correctly in the wrong shell . The noggins are spaced differently.
Last edited by Wrenchbender Ret.; 03/25/2015 9:39 PM.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Dec 2008 Posts: 337 Shop Shark | | Shop Shark Joined: Dec 2008 Posts: 337 | Actually the first answer above is incorrect regarding the low beam lamps. The low beam bulbs do have two filaments – the low beam (full power) filament and a low power filament which switches on when the high beam circuit is selected. The low beam filament goes out, and a lower power filament is activated. With the high beam lamps illuminated, the low beam bulbs become marker lamps. Ron Francis offers a “Headlight Brightener” jumper which keeps the full power low beam filament illuminated when the high beam circuit is selected: https://www.ronfrancis.com/prodinfo.asp?number=BJ-2I had enough left over parts to make one of these myself and it works as advertised: http://imageshack.com/a/img706/1296/jumperharness004.jpg | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I think Howie is correct. Both lights are on full high beam when the high beams are turned on. The outers have low beams. Relays are a good idea especialy on the high beam side. The Halegen bulbs draw more current then the older bulbs. They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Feb 2002 Posts: 2,890 Socket Breaker | | Socket Breaker Joined: Feb 2002 Posts: 2,890 | | | |
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