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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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| | | | Joined: Oct 2013 Posts: 23 New Guy | | New Guy Joined: Oct 2013 Posts: 23 | I have installed a new alternator on my 283 chevy engine, along with a new 12 volt American Autowire harness. I have had the battery disconnected while I worked on the rest of truck. Yesterday I hooked up the battery cables and noticed that the alternator started to feel warm while sitting and not running. Have I left something out or wired it incorrectly? I followed the directions exactly on the wiring diagrams, it runs fine when I start it up. 1953 Chevy pickup w/ mustang II front conversion/TH350 and 10 bolt rear out of a '68 Firebird. Thanks in advance for your advice. | | | | | Joined: Jun 2012 Posts: 1,747 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,747 | One wire alternator? Internal regulator? There can be some reasons the alternator gets warm sitting and they are all bad. Recheck the wires from the the alternator. No pinch, or shorts. You might need a diode inline to prevent discharge when off. You might have a bad regulator or some other issue. Disconnect the battery and find the problem.
Steve H
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | You probably have the bat hooked up backwards.
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: Oct 2013 Posts: 23 New Guy | | New Guy Joined: Oct 2013 Posts: 23 | It is a three wire alternator. I noticed that American Autowire make an adapter with a diode wired to one side of the two wire connector that will plug into the alternator. I think I will call them in the morning and see if they can offer up any answers. | | |
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