What was found
SHORTLY AFTER DEPARTING THE HELIPAD NOTED THAT THE BATTERY AND INSTRUMENT LIGHT WARNING LIGHTS WERE ILLUMINATED ON THE CAUTION, AND ADVISORY PANEL. THE CREW AND I ELECTED TO RETURN TO THE PAD AT CODY REGIONAL HEALTH TO TRANSFER THE PATIENT BACK TO THE HOSPITAL. NO ADDITIONAL ABNORMALITIES OCCURRED THROUGHOUT THE FLIGHT WHICH LASTED FOR APPROXIMATELY 10 MINUTES FROM TAKE-OFF TO LANDING BACK AT THE PAD. REMOVED DEFECTIVE RELAY AND INSTALLED NEW RELAY I/A/W AIRBUS STANDARD PRATICE MANUAL MTC CHAPTER 20. OPERATIONAL CHECK GOOD.