There may be several reasons why the air only blows out the front vents and not on the floor or the defrost on the 2003 Dodge Ram. The fuses may be blown, or the heating coil is not working correctly.
sounds like the vent door that changes the air from defrost to heater is jamed its a little metel door like a flap.follow the cable from defroster switch and you should be at the door,its a manual door
no heat to front window went defrost is on
This is the same on all cars. When the air flow is OFF in a section, the it blows stronger to the other vents. In this case the ones for the windshield. This makes defrosting quicker so you can start driving safely sooner.
Check for vacuum leak either under dash or hood Check for bad vacuum motor under dash Defrost is the default setting for this vehicle
Try unplugging your AC compressor and see if it still blows the fuse. When you turn on your defrosters you also turn on your AC.
It would depend on which defrost system is not working, the rearview mirrors, back window or front window.
Check the blend door actuator.
Take the whole lens out
it blows wind
Remove the front grill to access the headlights.
LOL rear wheel drive