Power steering checked the fluid, its full but the steering is still REALLY stiff. wheres the pump located?

2 possibilities.
1.most likely your rack and pinion is out due to faulty power steering pump.
2.less likely your power steering is out.

Check the drive belt to the power steering pump and the level of fluid in the power steering reservoir.

Is it full of power steering fluid ? How are the hose's high pressure and low pressure ? Did you bleed the air out after changing the pump ? There is no filter .
Verify power steering fluid level per operating specification. Refer to Checking and Adding Power Steering Fluid.
Start the engine. Rotate steering wheel from left to right. Check for sign of cavitation or fluid aeration (pump noise/whining).
Verify the fluid level. Repeat the bleed procedure, if necessary.

Sounds like a power steering pump. The pump provides pressure to move the steering in both direction, with no hydraulic assist it will be stiff.

YOU HAVE AIR IN THE POWER STEERING SYSTEM.YOU NEED TO BLEED POWER STEERING PUMP FIRST BEFORE DRIVING VECHICLE.CHECK POWER STEERING FLUID LEVEL ADD MORE POWER STEERING UNTIL REACH FULL COLD MARK..RAISE VECHICLE FRONT WHEELS OFF THE GROUND.START ENGINE LET IT IDLE WHILE TURNING STEERING WHEEL LEFT TO RIGHT NON STOP DONT LOCK OR STOP STEERING WHEEL KEEP TURNING IT SEVERAL TIMES CHECK POWER STEERING FLUID IF LOW ADD UNTIL YOU GET COLD MARK ON DIP STICK DONT OVER FILL POWER STEERING PUMP BLOW A SEAL.IF POWER STEERING FLUID LOOK TAN COLOR SYSTEM FULL OF AIR.TURN OFF IGNITION LET CAR SET FOR A WHILE CHECK FLUID LEVEL.IF STEERING WHEEL FEEL STIFF HARD TURNING DONT DRIVE CAR UNTIL YOU HAVE NORMAL STEERING.IF STILL HAVE AIR IN SYSTEM BLEED SYSTEM UNTIL AIR IS OUT.

Have you checked the steering fluid? If that is good, it may be the pump

Had same trouble with my 2005 F-150. There are 2 universal joints on the steering column shaft, 1 in the center of the shaft and the second down by the steering box. Sprayed rust check on these joints over 5 days and they eventually freed up and then covered them with grease. She steers perfect now and I did that last fall.Saved 700 dollars at the dealer.

you need to check your lines to make sure they arent bent or being blocked somehow, yes it could be and probably the power steering pump. relatively easy fix for diy'er .. job difficulty 3/10

have the power steering pump checked, sounds like low pressure, a quick test drive by a front end tech will decide if the pump is the issue or the rack and pinion steering unit is the cause..

your pump could possibly be going bad. if it sounds like the fluid is low even though it is full you need to replace the pump. also check the steering linkage and shaft to the steering gear box to make sure there are no obstructions. hope this helps...