Question about 1997 Toyota RAV4

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Windshield washer pumps not working in 1997 RAV4

Just recently both my washer pumps for the front and rear stopped working. The fuse for the wipers is fine and the manual doesn't state a different fuse for the washers. Not one, but both pumps are working which leads me to believe that this is an electrical problem. Any suggestions of similar experiences? many thanks, Simon.

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  • Toyota Master
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Hi there.
see if you can find anything at this link to try and help you find out why.
Windshield washer pumps not working in 1997 RAV4 Google Search

Posted on Nov 17, 2017

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4 Suggested Answers

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6ya staff

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Posted on Jan 02, 2017

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Anonymous

  • 82 Answers

SOURCE: 1998 Toyota Starlet - Windshield Washer not working......ideas?

the washer motor is gone then ,,,its in the bottle,,

Posted on May 08, 2009

ourhowse

Dar

  • 2007 Answers

SOURCE: rear windshield washer works but front does

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".

Posted on Feb 01, 2010

Ahmet Gunduz

  • 280 Answers

SOURCE: my front windshield wiper pump

First make sure you have water in washer reservoir, with ignition on reds (not started) then get someone to operate washer while bonnet is closed otherwise the wipers (may come on) may damage your bonnet (would also be a good idea to throw some water on your screen before commencing), listen for a buzzing noise, if you can hear that noise than your washer motor is ok, if not - if fitted with fuse check it and if fuse is ok than your motor needs attention. If motor is ok than while someone is operating the washer motor look under the car to see if there is any water leaking, if there is water leaking than the hose going from your washer bottle to your washer nozzles has come off somewhere, visually check this hose, usually small diameter and clear in colour, reconnect or replace it. If there is no water leak and you have full water and motor is working, than your nozzle, usually located on the bonnet or wiper arms are blocked, this mainly happens after polishing the vehicle. There are 2 main ways of cleaning these nozzles, easiest way is to get a fine pin and poke it several times, this will clean it 85% of the time, if it does not work than you need to find the hose that connects to it and pull apart at a join, closer to the nozzle the better, and give it short burst of compressed air, have to be careful not to pop the hose out at the nozzle as some of them are located in really awkard points, hope this helps.

Posted on Apr 12, 2011

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Principles of Operation
Operation of the windshield wiper and washer is controlled by the front wiper/washer amplifier assembly. The front wiper/washer amplifier input comes from the multifunction switch by means of a voltage divider circuit. A constant voltage is applied to the multifunction switch by the front wiper/washer amplifier. When the multifunction switch is moved into the LO, HI, or intermittent position, the voltage is directed through a series of resistors. This results in various voltages being returned to the module for each switch position. The module then grounds the appropriate circuit, based on the voltage signal received back from the multifunction switch. This causes the wipers to run intermittently, or at the appropriate speed. Voltage is supplied to the wiper motor by the CJB fuse F46 (20A).
When the multifunction switch wash button is depressed, it bypasses all of the resistors returning a full voltage signal to the module. The module then grounds the appropriate circuits to operate the windshield washer pump for as long as the switch is depressed. The windshield wiper speed is dependent on the position of the windshield wiper/washer switch.
Voltage for the windshield washer pump is also provided by CJB fuse F46 (20A).
Operation of the rear wiper and washer is controlled by the rear wiper/washer switch.
Voltage is supplied to the rear window wiper motor by the fuse junction panel fuse F44 (10A).
The rear window wiper motor ground is made or broken by the rear wiper/washer switch. When the rear wiper/washer switch is moved into the WIPER position, it grounds the rear window wiper motor circuit, causing the rear window wiper motor to run once every 10-15 seconds.
Voltage to the rear washer pump motor is also supplied by the CJB fuse F44 (10A). The rear washer pump is directly controlled by the rear wiper/washer switch which makes or breaks the ground for the washer pump motor, depending upon its position.
If the vehicle is equipped with a movable liftgate glass, a liftgate glass switch is utilized to prevent rear window wiper operation when the liftgate glass is open. This same switch also causes the rear window wiper to drop down approximately three inches when the liftgate glass latch is released.
------------------------------------------------------------------------------------------
  • The wipers stay on continuously — rear wiper
  • Circuit.
  • Rear wiper/washer switch.
  • GO to Pinpoint Test L .


---------------------------------------------------------------------------------------------
Measure the resistance between rear wiper/washer switch C288 pin 6, component side and rear wiper/washer switch C288 pin 2, component side.
  • Is the resistance less than 5 ohms with the switch depressed, and greater than 10,000 ohms with it released?
sxv~us~en~file=arrow.gif~gen~ref.gifYes GO to L2 .
sxv~us~en~file=arrow.gif~gen~ref.gifNo INSTALL a new rear wiper/washer switch. TEST the system for normal operation.

Measure the resistance between rear wiper/washer switch C288 pin 6, circuit WB08 (BU/YE), harness side and ground.
  • Is the resistance greater than 10,000 ohms?
sxv~us~en~file=arrow.gif~gen~ref.gifYes INSTALL a new rear wiper /washer switch. TEST the system for normal operation.
sxv~us~en~file=arrow.gif~gen~ref.gifNo REPAIR circuit WB08 (BU/YE). TEST the system for normal operation.

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