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Message: <blockquote data-quote="adam" data-source="post: 2028045" data-attributes="member: 213499">1990 Chevrolet 1500 Truck.Edelbrock carb. Intake. So, all the electrical stuff is not hooked up like it would be if it was EFI. Problem is I cant get this alternator to charge. There is a thick red wire that runs into the junction box on the firewall. There is a smaller back wire that runs from the alternator and disappears into the wiring harness, I cant make sense of any of this.  Any advice? What is a way to tell if the alternator works with out the use of a multimeter.</blockquote>