I FILLED MY WINDSHIELD WASHER FLUID TANK, BUT WHEN I TRY TO USE IT THE WIPER BLADES TURN ON BUT NO LIQUID SPRAYS ON TO THE WINDSHIELD

Hello. I think you have a faulty turn signal switch; the wiper/washer, low/high beam headlamp, windshield washer delay etc. circuits are all controlled by this switch. Good luck and keep me informed; if you want to.

There is a electric motor that pumps washer fluid . Located in the bottom of the washer fluid tank .
Wash Operation (Front and Rear Wipers)
The front and rear washer systems use the same windshield washer fluid pump. When either the front or rear wiper is in the washer position voltage will be supplied to one side of the windshield washer fluid pump (depending on whether it is front or rear), while the other side of the pump is grounded.
At this point, the windshield washer fluid pump sprays solvent onto the windshield. When the front or rear washer is activated, the BCM receives an input from the switch that is activated. The BCM will control the wipers while in the WASH mode. The BCM will control either the front wiper relay or the rear wiper relay to turn on the wipers. The windshield wipers operate at low speed for 3 swipes and returns to the park position.

When turning on the washers do you hear the motor run ? Have some one try it while you listen at the washer fluid tank ! These pump motors do go bad .
turn OFF the ignition.
Disconnect the harness electrical connector of the windshield washer fluid pump.
Connect a test lamp from the windshield washer pump control circuit to a good ground .
Turn ON the ignition, with the engine OFF.
Press the front washer switch.
Does the test lamp illuminate?
YES or NO !

There's a few things you might want to check. First, check to make sure the washer fluid reservoir is completely (assuming you hadn't already done that). After you are certain the reservoir is full, look for any possible leaks...either the reservoir or the hoses going from the tank to the windshield. If the tank and hoses are intact, turn on your windshield wipers...then try running the pump. If no washer fluid comes out, and for this you might need another person to assist you, try running the pump again...listening to make sure the pump is in fact running. If the pump does run but still no fluid comes out, inspect all of the hoses as well as all of the outlets where the fluid sprays the windshield...it is possible that the outlets may be plugged. Some common reasons for the outlets to be plugged...debris, dirt/mud, and/or wax (has anyone recently waxed your Freightliner?). Just to be sure, using a small needle or even a wire, ensure each outlet is cleared and not obstructed with anything. After that, try running the pump again. If no luck, try removing the hoses going from the tank to the windshield. Once removed, using something like a wire coat hanger, clear each hose for any possible obstruction. Reattach hoses and try running pump again. If still no luck, I would guess the problem might be located with the washer pump itself. Before opting to replace the pump, if you believe that is the problem and the pump just doesn't operate, check all fuses and inspect any/all wiring connections.

Good luck
Jason

The hose that the fluid runs through has a hole in it or one of the little plastic hose connectors has sprung a leak or is partially disconnected.

Check and verify that you indeed have the winshield washer tank filled if the tank is filled make sure the winshield washer hoses are attached to the washer nozzles under the hood if all of this checks out you probably have a bad windshield washer pump...

First try to clean out the squirter nozzles.Take a very small wire, sometimes a staple works great, and stick it into the nozzle to clear any debris.Then try to spray it again.If this didn't solve the problem and the debris is cleared, then you either have a weak or blocked pump, which is located on the washer reservoir itself.Hope I could help!!! Rate me accordingly!! Thanks!

make sure you have plenty of washer fluid.if all is good.have some one turn on ignition and on turn on wipers washer motor. if you hear washer running look for kinked damage or disconnected hoses.also make nozzles not cloggeg up.if so you can use a pin or paper clip to un stop it.if you dont .hear no washer running check for electrical power.if yes replace washer.it not.check switch and wires.

thats a small repair, you could probably diy, check your local junk yards for the fluid tank assembly, probably around 30 bucks and swap them out good luck and rate me

WHEN YOU TURN ON WASHERS CAN U HEAR THE PUMP WORKING IF YOU CAN IT WILL BE
BLOCKED WASHER JETS OR LINE OR WASHER PUMP IS FAULTY.

Check your fuses