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Global Mod,
Mod | | | Forums66 Topics128,024 Posts1,055,395 Members48,422 | | 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: Nov 2011 Posts: 141 'Bolter | | 'Bolter Joined: Nov 2011 Posts: 141 | I have many new voltage regulators that came with a collection of parts. Basic, standard looking black, rectangle, delco style regulators. They all have different numbers on the backs. On the inside the all look the same. How do I tell if for 6 or 12 volts? And perhaps what trucks they go with.
Numbers include. 8AA 3KD 1HD 9CB 2LB 7FA
Thanks.
Trombones Totem Poles And Old Trucks!
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | I do not know how to determine 6v vs 12v I think you have date codes, not part numbers?
Year Month Day (Maybe?) I do not know how to determine decade.
8 A A could be:
8 = 38 48 58 A = January A = 1st (Happy New Year?)
Maybe someone know better/correct interpretation? | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | The 6 volt Delco regulators that I have seen all have two screws in the covers , one in one corner and one in the opposite corner on the diagonal. The 12 volt regulators have a flange on each end at the base level. t The cover screws are short, one on each end at the flange. This does not apply to aftermarket regulators. | | | | | Joined: Feb 2004 Posts: 29,747 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,747 | Check the cutout relay closing voltage- - - -this can be done with a simple battery and a rheostat. The regulator doesn't even have to be mounted on a vehicle. PM or email me for a more detailed description. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Used to always switch to a solid state regulator on both 6v and 12v. No coils/contacts to mess with. They (used?) to make solid state kits to fit into the original housing for the purists. Think most solid state ones run about $20 on ebay. Before internal regulator alternators we used the 64-69 Chrysler one wire in--one wire out regulator on the street rods. Very small and dependable so a mounting place was easy to find.
Evan
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