Why is low coolant light coming on?

MAYBE THIS "THINGEE" IS UNPLUGGED OR JUST "PLAIN OLE" WENT BAD

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_coolant-level-sensor-bwd_18260611-p?searchTerm=coolant+level+sensor

WHEN I INSTALLED YOUR INFO (GUESSED YOU HAD A 6 CYL), IT PULLED UP ALL OF THIS

http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/PartSearchCmd?storeId=10151&catalogId=10051&pageId=partTypeList&suggestion=&actionSrc=Form&langId=-1&searchTerm=coolant+level+sensor&vehicleIdSearch=146276&searchedFrom=header

LOOKS LIKE THEY SELL THE CONNECTOR TOO.......HMMMMM...WONDER WHY!

MUST HAVE PROBLEMS IN THAT DEPARTMENT TOO

THE PART I LIKED WAS THE CONNECTOR COST IS 3 TIMES THE AMOUNT OF THE SENSOR COST

DON'T YOU WISH YOU HAD SOMETHING SIMPLE, WHEREAS, ABOUT THE ONLY PLASTIC FOUND ON IT ARE THE SHIFTER K.NOBS AND THE STEERING WHEEL, AND IT WOULD LAST LIKE....FOREVER?......LIKE A '46 WILLYS JEEP???

THE MEDIC