Windshield Wipers won't spray 2004 Rav4

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 !

Diagnose Turn Signal Problems eHow

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.

THE WASHER NOZZLES COULD BE STOPPED UP.USE SMALL PAPER CLIP TO CLEAN OUT ALL NOZZLES HOLES SEE WHAT HAPPEN.

when you turn the wipers on do you hear any sound? If so, then you may have disconnected a ball joint in there behind the firewall - typically the top (black) panel (under the wipers/ at the back of the hood) comes off or you could find other access to inspect more thoroughly to be sure. If no sound, test the power to the wiper motor with a test light, if no power, check fuses, wiring, ground, etc.,
Best regards
Ck

Its the same fuse that supplies power to the wiper motor so if the wiper motor is working than the fuse is good.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Inside the Reservoir Under the Hood there is a Small Pump that needs to be Replaced.

Hi gerry the wipers are eletric what year is it this sound like a wiper spindle seezing up spray oil down behind the wiper arm, try that might just be freeezeing up    D

I found problem to be that corrosion sets in between the CAMS plates that circle in an opposing fashion and does not let the wiper arms park correctly. Be very careful with this mechanism if you have the cowling off TURN the KEY and WIPERS OFF and watch your fingers so you don't get them caught.
WARNING if you leave the power on and try to move the arms This cam mechanism springs to life and will try to self park the wipers on their own so Turn the Power and Wipers Off.
SOLUTION: 1. With the ENGINE COLD, Spray a lubricant that FREE'S CORRODED PARTS like WD-40 between the gap of the 2 CAM Plates and on Top of the plates, or use some other automotive parts lubricant that free's corroded parts(let it soak for 5 minutes). 2. Gently Try to manually move the arms back and forth a little bit so that the spray works into the parts. 3. This may not be necessary but I had to do this the first time. There is a notch in the top cam that has a STUD that locks the 2 CAMs together. You can push on this STUD to unlock the cams by manually moving the wipers(use a screw driver to push on the STUD and have a friend gently move the wipers manually. Spray the area LIBERALLY with with the Lubricant Spray and see if you can move the CAMS back and forth and work the lubricant in.
Then with the wiper cover out of the way and all tools clear Try to cycle the wipers HIGH and LOW, ON and OFF a few times it may stick the first couple times with the wipers in the up position but I am confident that the lubricant will work its way in and free these CAMS the way they are supposed to. Your wipers should self park after cycling them after 5-10times. This should solve most of the problems with these wipers and should be relubricated as needed. Clean up any extra lubricant Put the wiper cover back on.

there is another small relay box just below the windshield washer reservoir about 11/2" wide x about 4" long the washer pump relay is in there