Ford: floor heat in F-150 truck 1992, f 150 truck, ford f 150

Question
Cannot get heat to the floor outlets in my 1992 ford F-150 Truck. Is straight 6 Cyl with 5 speed stick trans and has no air conditioning.Blower is operating and plenty of heat and air from defroster.Nose is red and feet are ice color,LOL.

Have not checked anything.Going to make sure vacuum
hose is connected to engine tomorrow cause have a little lopey idle. Main reason for e mail is to perhaps locate on line trouble shooting chart and perhaps routing diagrham of hoses.Thank u Bill

Answer
Bill if you are aoly getting defrost then you are in safe mode go under the hood back by the firewall were the heater hoses come out you should see a black plastis hard small vacumm hose follow it to see if you have vacumm if not then follow it to the sourse towards the intake .if you do then follow it inside to see if it is unpluged or broken .