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First check both battery connections for nbeing clean and secure ...plus the battery itself for being good.
Once that is done and they are good toy have to head for the main harness from the starter solenoid to along the firewall...and unwrap the tape to inspect the fusible links.
BTW <> Welcome to FTE!
May I guide you toward this thread and especially post #1 ..... as it will aid you in navigating FTE