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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 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | Do you have a model number for your alternator? Knowing what size it is might make a difference in wire size as you connect it.
The 1-wire approach requires revving the motor to get the alternator above a certain speed before it begins charging. Using all three wires means the alternator will provide power when it is needed.
I'm not a fan of the 1-wire approach though many others love it.
If you get the resistor wrong you might cook or under power the Pertonix. I'd suggest swapping to the 12-volt version.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
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