Check and clean all your grounds especially the one on the regulator and make sure there is enough grounds...Motor to body to battery then spray some of the battery wax on all the connections to keep them from corroding, The ALT to REG wires.... The bat one goes to the solenoid hot side,S goes to S on the reg F goes to F, The light green with red line is the ALT light its really simple, But if its not grounded really good it wont charge.