Having a charging issue on a 01 2.4 Sonata, alt. charges then quits, battery light and brake warning dash lights come on, no output, had alt. bench tested, checked out OK, reconnect and it works for a short while, have battery voltage at hot stud, and 3 terminals on the plug, all connections are clean, the diagram shows a generator relay, which I can't find, and a Pre exitation resistor which I also can't find. I replaced link at pos term. to alt. Any insight into this would be appreciated. For some reason I can't download schematics from Hyundai website. Thanks