Windshield washer fluid pump not working

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 !

Why Won't My Windshield Washer Work? - RepairPal

repairpal.com > Car Care Advice > Troubleshooting

Check the Fluid First, check that the windshield washer bottle has fluid and that ... If the pump is not heard, check the fuse panel to see if there is a blown fuse.

Windshield Washer Pump and System Diagnosis - YouTube

? 10:00
https://www.youtube.com/watch?v=0SdUhyQF4tY
Sep 9, 2012 - Uploaded by RatchetsAnd Wrenches
Here is a step by step guide to diagnose any trouble with yourwindshield washer pump, or other issues that ...

A washer pump in a car's windshield wiping system moves washer fluid from a reservoir through hoses. The motorized pump pressurizes the fluid to allow it to be squirted from the hoses through nozzles onto the front and/or rear windshield of a car. The washer fluid helps windshield wipers get rid of rain, dirt, or other objects that can interfere with a driver's visibility. If your washer fluid is not being sent out when activated, the solution could simply be filling the washer system's reservoir with more fluid or cleaning the nozzles and hoses. In more severe cases, the washer pump may need to be replaced. Here are steps to troubleshoot a windshield-washer pump.

Try this link in case you are stuck:

How to Troubleshoot Windshield Washer Pump

Here is another YT video for a similar purpose:

Windshield Washer Pump and System Diagnosis

It sounds as if the windshield washer pump, located at the base of the windshield washer fluid reservoir, has lost it's seal. When this occurs, washer fluid seeps into the pump and shorts it out. I advise that you remove the pump to confirm this before replacing the fuse. A replacement wind washer pump and fuse can be found at your dealer, local auto parts store or the internet (Rockauto.com has always been a great source for quality parts at a very competitive price and I use them all the time). Hope this helps.

Check that the fluid reservoir is full of windshield wiper fluid and that the pump is not worn out or burnt out. May have to get a new pump and remove and replace to fix this problem. Also, check that the windshield wiper fluid is winter type and not summer type in cold climates.

Probably need to replace the pump. Separate pumps for front and rear. Check with a test light to see if there is power to the pump. If it has power but won't work, replace the pump. If no power, you have a wiring issue. Be sure to turn the switch on and have someone push the washer button when you are checking for power. There won't be any until you push it to "wash".

the pump motor likely is bad. get a used washer fluid reservoir at a pick n pull yourself or at car-part.com. page with * is lowest cost.

Pump and Reservoir, Windshield Washer Removal

1. Disconnect the battery ground cable (14301).
   
2. Raise and support the vehicle.
   
3. Remove the RH wheel (1007).
   
4. Remove the RH front fender splash shield (16103). Refer to Section 01-02 for the removal procedure.
   
5. Remove the windshield washer reservoir top bolt.
   
   
6. Disconnect the windshield washer reservoir fluid level sensor electrical connector.
   
7. Disconnect the rear window washer pump electrical connector from the rear window washer pump.
   
8. Disconnect the windshield washer pump electrical connector from the windshield washer pump (17664).
   
9. Place a suitable drain pan under the windshield washer reservoir (17618) and drain the washer fluid.
   
10. NOTE: The rear window washer hose end is color-coded, matching the connector on the rear window washer pump. Match the colors to ensure proper installation.
    
    Disconnect the washer hoses from the windshield washer pump and the rear window washer pump on the windshield washer reservoir.
    
    
11. Loosen the two windshield washer reservoir side bolts.
    
12. Remove the windshield washer reservoir by sliding it out of the side slots.
    
13. Remove the windshield washer pump.
    
    Installation

To install, reverse the removal procedure. Tighten the lug nuts (1012) to 98-118 Nm (72-87 lb-ft).

Rear washer may have it's own reservoir . Can you hear a pump humming when you activate the washer? Look in the under flooor compartment

A-Service — First visit at approximately 10,000 miles or 1 year, but determined by Flexible Service System; then every 20,000 miles or 2 years.
Interior
· Function check
· Check warning and indicator lamps, illumination and interior lighting
· Check windshield wiper, windshield washer system, headlamp cleaning system
· Reset maintenance service counter in instrument cluster

Wheels, brakes
· Check front brake pads for lining thickness
· Check tires for damage, condition
· Correct tire inflation pressure

Engine compartment
· Change engine oil and filter
· Fluid level checks of the following:
· Engine cooling system, antifreeze and corrosion protection
· Windshield washer system
· Brake system
· Check and correct battery fluid level
· Check battery condition
· Check catch, safety catch and hinges on engine hood for proper operation
Trunk
· Correct tire inflation pressure in spare tire
· Check battery condition

B-Service — First visit at approximately 20,000 miles or one year after previous service, but determined by Flexible Service System; then every 20,000 miles or 2 years.
Services performed:

Interior
· Function check
· Check warning and indicator lamps, illumination and interior lighting
· Check windshield wiper, windshield washer system, headlamp cleaning system
· Reset maintenance service counter in instrument cluster
· Replace dust filter (not applicable to SL-Class)
· Replace combination filter (SL-Class)
· Check parking brake (function test only)

Wheels, brakes
· Check condition/thickness of front and rear brake discs
· Check front and rear brake pads for lining thickness
· Check tires for damage and condition
· Measure tread depth, record in mm
· Correct tire inflation pressure

Underside of Vehicle
· Check for major components leakage
· Check for chafe marks, line routing, damaged components
· Check condition of front axle ball joints and rubber boots
· Check condition of mechanical steering components and rubber boots

Engine Compartment
· Check for major components leakage
· Check for chafe marks, line routing, damaged components
· Check and replenish all fluid levels
· Change engine oil and filter
· Check engine cooling system, antifreeze and corrosion protection
· Check brake system
· Check power steering
· Check Active Body Control
· Check windshield washer system
· Check and correct battery fluid level
· Check battery condition
· Check catch, safety catch and hinges on engine hood for proper operation
· Check condition of poly V-belt

Trunk
· Check battery condition
· Correct tire inflation pressure in spare tire