One of the pressure lines may be collapsed or blocked not allowing flow for power assist .
Yes first follow Roberts suggestion and check all the lines first for clogs blow air through them or for being collapsed or being bent or installed backwards and was this condition present and that's why you changed the pump ? Yes/no there's a pressure sensor on the line it could be shorted from fluid getting into the plug but I think that your steering box has become clogged and fluid can't travel through it or the seals have swelled out from putting brake fluid in and not power steering fluid yes they are both hydraulic fluid but the have different additives for the seals inside the steering box ,but it just could've failed because it's 21 years old now by door /post sticker build date and they don't last forever 21 years is a real good run for the $$$ also there is a power assist module that might have failed
The service and repair manual with diagram will provide you step by step help to locate and fix the problem easily and you will get the manual from the given link https://toolsnyou.com/
SOURCE: 2001 ford expedition electric fuel pump went out.
unfortunately it is not easy to replace. the pump is inside the fuel tank therefore the tank has to be removed to replace the pump.
SOURCE: the bracket that holds the alternator and the
You might find one at a Junk Yard or be able to order it from the dealer, that is where I would look for it in that order. As far as how easy it is to replace that will depend on how everything is connected and if the job requires special tools.
SOURCE: 2003 Ford Expedition, low idle, no power while driving.
sounds like water in gas. add gas line antifreeze. 2 bottleshould do it.
SOURCE: 1999 FORD EXPEDITION 2WD 4.6L EGR VALVE,EGR
Remove the throttle body housing on the top of the intake, it is a 90 degree tunnel like small piece held by 4 small bolts, turn it over and look for two holes, these holes are for the EGR valve flow, they are probably plugged up with carboned crud, clean them out with the tip of a screwdriver if neccessary to remove all the crud, once its clean reinstall it and reset your check engine light, hope this helps, let me know
SOURCE: 1998 ford expedition front windshield washer
fuse for washer pump, can you here the pump, if not then power to pump isn't present. Check the fuse for it.
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Ok follow Roberts lead here you could have twisted a line or the tubing is collapsed also if this is so you should have fluid backing up and coming out of the reservoir if not there is a pressure sensor that could have failed also did you have the trucks wheels off the ground when filling it with fluid if not it should be so you can bleed the air from it by turning the wheels back n forth without hitting the stops to get the air out of the fluid also are you sure you put the lines back in there correct fittings? Take off each line and blow through it or use air to make sure it is not clogged this includes the cooler if it applies if all else you tried doesn't work the steering gear maybe clogged or has failed
Did you bleed the system of air with the wheels off the ground if not jack it up and turn the wheel from side to side DO NOT HIT THE ALL THE WAY STOPS JUST BACK N FORTH AND ADD FLUID TILL, THE FOAMING GOES AWAY
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