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| | | Forums66 Topics128,035 Posts1,055,567 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! | | | | Joined: Jan 2011 Posts: 15 New Guy | | New Guy Joined: Jan 2011 Posts: 15 | I have a 1961 c 10 purchased from original owner. Bought several systems to upgrade the wiring. Anyway when installing the alternator instructions said to open the wire loom in the engine bay, and run the supplied red 12 ga. wire from alternator to 12 ga. wire in loom. That went well. Next take the 20 ga. wire supplied and run from alternator to and tie in to the 20 ga. wire in the loom. I know the wire loom is original to the truck but my loom has a 20 ga. wire in stead of brown. Checked the service manual and it shows brown. Has anyone seen this before? sorry for the length. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Idfain, I think you have left out a bit of information about wire colours. The original generator wiring can be used to wire the new alternator, you just have to remove it from the generator voltage regulator and either splice it together in the case of the red output 12ga. or continue the field wire to wherever the alternators instructions say to attach it, hope that helps. | | | | | Joined: Jan 2011 Posts: 15 New Guy | | New Guy Joined: Jan 2011 Posts: 15 | Sorry, installed alternator wire harness from Mad Enterprises and removed harness from generator. Have got it figured out just noted the wire harness on truck has one wire red instead of brown per shop manual wire diagram. Thought it odd as truck has original harness. | | |
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