Re: 68 C10 Yellow wire from firewall to starter/coil.
Here's the same diagram with all you need to charge the battery and supply the system with amperage. The advantage of this wiring is that the alternator can feed the circuits without going through the battery as you have it wired. It will also allow the battery gauge to work whereas if you wire the alternator output directly to the battery positive post it bypasses the sensing system for the battery gauge and it won't work.
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VetteVet
metallic green 67 stepside
74 corvette convertible
1965 Harley sportster
1995 Harley wide glide
Growing old is hell, but it beats the alternative.
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