CHECKED THE LOW & HIGH PORTS BY DEPRESSING TIRE LIKE VALVE STEMS - BOTH MADE HISSING SOUNDS. WOULD CONNECTING AN R134A FREON KIT WITH GUAGE WITH SYSTEM OFF CAUSE THE KIT GUAGE TO REGISTER IF FREON IN CHARGED ZONE (I.E. YELLOW ZONE, BLUE ZONE, ETC). Does one alligator clip hot wire to the...