In most cases an air conditioner leak on the passenger side where coolant leaks is due to either a broken hose near the back of the footwell, or from the blower motor dying out and causing a backup that breaks a seal. Simply remove the glove compartment by unbolting or unhooking it and take a look around to see if you find any damage in the area behind it, or use a light and look near the back of the footwell for an leak signs of any hoses that may be visible. If you can't find any problems, you may be better off seeking a qualified mechanic.
what eng. do you have? if it is a 5.4 or a 4.6 it is under the intake manifold on the passenger side.
its under the hood on the passenger side by the fire wall right on top
On the passenger side, way back, under the exhaust manifold.
The blower motor should be under the hood. It is on the passenger side and bolts into the back of the heater housing.
Also check the water pump, alternator and tensioner pulleys.
I have to believe that it would be a bad wheel cylinder that controls the back brakes.
On a 2001 Ford F150, the turn signal flasher is located in a relay box on the passenger's side of the steering column. To access it, you must remove the panel under the steering column.
passenger side
passenger side by your right foot
Mine was located under the hood on the passenger side fender well close to the battery.
The blower is located under the the passenger side dash. The resistor should be on the left side of the housing.
I dont have a F150, but in my old 95 contour, it was under the cowl (where the hood meets near the windshield). I had to remove a cover, then pop open some clips to pull the filter housing out. There might be another (or the only one) under the dash on the passenger side.