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Old 09-16-2015, 04:00 PM   #15
toolboxchev
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Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
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Re: 68 C10 Yellow wire from firewall to starter/coil.

Quote:
Originally Posted by VetteVet View Post
Another possibility is the diode in the alternator. Before you pull the HEI wire you should disconnect the plastic plug in the alternator and the external regulator plug if it has not been converted to an internally regulated alternator. If the engine dies than it is most likely the diode in the alternator. It may charge just fine when it's running but it will back feed the ignition circuit if the diode is shorted through.
So if I wish for my electrical system to be working properly with an HEI and standard externally regulated alternator both the resistor wire and the plug on the alt with blue and white wire can be eliminated?

I am still an electrical newbie
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