How do you unclog the rear window washer reservoir? The wiper works, there is water coming out of the front but no fluid comes out of the rear. Thank you!

Firstly have someone operate the rear washer while you listen for motor operation at the front wheel well of the car (same side as the washer fluid reservoir).
If you can't hear the motor, then the motor is likely faulty and requires replacement.
You can operate the front washers to locate where both motors are. (under the car, beside the wheel well.)


If the motor is working but no water is coming out, then remove the rear washer jet and disconnect, then using a high pressure airline, blow backwards into the jet to clear out any blockage. If you don't have a high pressure airline with nozzle, then use something like the nylon filament from a yard brush to poke into the jet, to try and clear the blockage.

Park the vehicle in a dry area, try pressing the washer, open bonnet and have a look to see if there is any water on the ground or in engine bay, if there is then one of the hoses that go to the washer nozzles have broken or come off, simply replace, if there is no sign of water, get yourself a fine pin and clear the nozzle with it (where the water comes out from), if you can get behind the nozzle you can also blow it out with compressed air, usually this happens after polishing the vehicle.

The rear washer fluid comes from the main reservoir under your hood for the front window. Sometimes the rear will not work because it is not filled high enough, hope this helps

One can get a repair kit that includes a new motor pump and wiring clips, or

one can get the original motor that plugs into the windshield wiper fluid reservoir.

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Windshield wiper reservoir (gives idea of how to change the windshield wiper fluid pump motor) Removal & Installation To Remove:

1. Disconnect and isolate the negative battery cable.
2. Raise and safely support the vehicle.
3. Remove the right front wheel and splash shield.
4. Disconnect the electrical connectors from the pumps and detach the rear washer hose.
5. Place a drain pan under the reservoir if it contains fluid.
6. Disconnect the front washer hose at the wiper unit in the engine compartment. NOTE: The front hose will be removed with the reservoir.
   
7. Let the fluid drain from the reservoir.
8. Remove the mounting screws and the reservoir.

To Install:

1. Install the fluid reservoir with the mounting screws.
2. Connect the front washer hose in the engine compartment.
3. Connect the electrical connectors and rear washer hose.
4. Install the splash shield.
5. Install the right front wheel.
6. Lower the vehicle.

Yes there are two pumps located in the wiper fluid reservoir. If your in a bind, you can switch the plugs and small hose that go to them because they are both the same. The upper pump operates the back, and the lower pump operates the front. The back won't work until it gets replaced, but it beats driving backwards.

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

If it is the same as a 2008 GMC Yukon with conventional power, it comes out of the front wiper fluid reservoir!

the tube goes along side the apron and goes into the bottom of the washer reservoir which is behind the headlighplease rate my response thank you very much

The reservoir is the same one for the front washers. There are two electric pumps on the base of the reservoir (one for front and one for rear). You probably need a new pump. It is accessible behind the panel in front of the front right wheel.