Windshield wiper spray 2011 tahoe doesn't work

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

I would start by checking fuses. If you've checked already, then the windshield washer pump has probably gone bad. The wiper motor and washer pump should be separate units. Typically the washer pump is located in the base of the washer fluid reservoir.

1. check your windshield washer fluid level.
2. make sure you can hear the fluid pump operating when you operate the switch.
3. If you can hear the pump working and you have fluid in the reservoir but still no spray,
   
4. check the washer fluid lines don't have holes and aren't clogged or pinched. check the sprayer nozzles make sure they are not clogged with debris.
5. if your washer still doesn't work your fluid pump is probably the problem.
   

The rear wiper has its own pump motor. pull the hose from the wiper and have someone engage to see if there is a clog. do the same at the motor. if bo liquid comes out then its the pump. also check fluid level in reservoir as well as a possible secondary reservoir

Sometimes disconnecting the battery does more damage then you want it might have trip a fuse or relay check those if thats not it, maybe wiper motor or transmission went out.

sounds like the spray nozzles are clogged you can usually remove them and soak them in soapy water or spray water through it with a sprayer on the end of a hose. if that doesn't solve it then you may have a cracked line or the pump that pumps it out may be broken but usually is the nozzles are clogged.

Check the rubber hoses to the sprayers. If they are on the hood they can come unplugged when you open it. Have a friend work the sprayers as you watch for leaks. An old toothbrush can be used to clean spray nozzles by scrubbing over the hole.

Check to see if the sprayer motor is working you would hear it making sounds like it wants to spray. If it is working then you need to check the hoses running to the sprayers on the windshield wipers and make sure that the hoses and the spray nozzle are not clogged with dirt or frozen.

This could be 2 things.

First of all, check for any debris blocking the sprayer holes.

Secondly, open the hood and make sure the hose running from the washer fluid tank is connected to the bottom of the sprayer.

It does not take very much dirt in the washer fluid reservoir to plug the nozzles for the windshield washers. check for dirt in the reservoir and clean out if need be. If you are in below freezing temperatures make sure your washer fluid is good for below freezing. mike