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  • OVERALL DIFFICULTY INDEX: 3/10
  • IF YOU HAVE NO TOOLS YOU PAY $50 TO GET THEM FOR THIS JOB
  • IF YOU HAVE NO EXPERIENCE YOU SPEND 3 HOURS TO CARRY OUT THIS JOB
  • RISK OF BURNS AND INTOXICATION FROM SOLDERING SEE BELOW
BEFORE YOU START
  • Be careful not to touch any hot part of the engine.
  • The below pictorial assumes you know how to handle a soldering iron.
How to refill the windshield wash liquid
DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.
NOTE: the below works occurred on a Renault Duster but the repair is common to all vehicles

Windshield washer pump diagnostic and fault finding

Diagnostic:
If your windshield wipers are operating normally and the washer pump makes no noise when you activate it, then:
  • This is not a fuse problem since the washer pump shares the same fuse than the wipers
  • The washer pump can be defective, or
  • The wiring of the washer pump is defective.
Fault finding:
The washer pump is either located inside the fender or below the windshield like it is shown here, a Dacia / Renault Duster in this case.

​If it is inside the fender like in this picture, visit our page for inner fender mudguard removal to access the pump.
Picture
​The grille below the windshield is first cleaned from tree leaves, debris, etc. with compressed air (middle).
The dismantling starts by removing whatever blocks the grille removal like this small rubber seal (right).
The retaining clips are then removed and the same for the rubber seal below the hood (right).
Detach now the washer hose from the T that distributes it to the washer nozzles and from its supports in the hood and on the grille.
Take out the grille.
The wiring of the pump is badly worn and its insulation damaged: no doubt it's a mouse attack!
The mouse also tasted the rubber hose sending the washer liquid to the wiper of the rear window.
The missing insulation and the traces of teeth on it are typical to mice and rats. A rat cannot access this pump but a mouse can!
Picture

Repairing the windshield washer pump wiring and connector

Cut the damaged portion of the wires and remove them along with the connector.
Use a 3 to 4 mm slotted screwdriver to open the connector and take out the small plastic cap.
Remove the silicone seal (green color, left picture).
Your wires are now free as shown in the middle picture but still hold to their terminal pins.
Take out the terminal pins holder (yellow color, right picture) and push the pins out with your screwdriver.
It is very difficult to extract the pins without damaging the small plastic "legs" that do hold them in place inside the connector but this is OK. The connector can still be assembled as shown further below even with little damage.

Windshield washer pump wiring: fitting new wires

The connector parts are shown in the left picture:
  1. Connector body
  2. Silicone seal
  3. Terminal lug cap
  4. Terminal lugs with a piece of wires
Solder new wires of the same color to the small piece of wire that is still crimped to the terminal pin.
Insert them into the silicone seal and insert a heat shrink sleeve on top of each soldered joint.
Use a heat gun or hair dryer to shrink the sleeves and reassemble your connector.

Windshield washer pump wiring refitting on vehicle

Plug the connector into the pump.
Now the new wires need to be connected to the ones in the vehicle.
Small crimping lugs are used.
Male and female terminals are crimped then the wires assembled together.
The damaged windshield washer hose has also been replaced with a new one (right).
Finally, the windshield washer is tested at both windshield and rear window. The pump makes its noise again and the washer works fine. 
Two hours were lost because of a mouse visit...

See also...

How to refill the windshield washer liquid
Windshield washer pump and nozzles cleaning
Windshield washer tube repair
More car electrical tips
all car maintenance & repair tips
Dacia Renault Duster service manual

...and similar windshield related items you can purchase from our partners' stores:


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  • Home
  • About
  • Contact
  • My Blog
  • Our Free DIY Tips
    • DIY basics
    • Safety At Home
    • Garden tips
    • Finishing Works
    • Home Appliances
    • Plumbing
    • Multimedia
    • Electrical
    • Car Maintenance & Repair
    • Small Generator Fixing
    • Bicycle fixing
  • Small DIY Projects
    • KITCHEN AND BATHROOM >
      • Kitchen: build a trolley | Not a robot
      • Adding shelves between cabinet and wall
      • Kitchen: adding small shelves for spices
      • Bathroom: free space | remove the bidet
      • Bathroom: Replace your embedded PEX outlets
      • Build a shower tray for elderly people
      • Installing an above counter basin
    • GARDEN >
      • A Low Cost and Easy to Fix Trellis Separation
      • Installing a water tank
      • Superb DIY garden pond with jar
      • Backyard workshop and storage
      • How to build a brick planter
      • Installing and programming a motorized gate opener
    • BEDROOM >
      • Adding a panel heater
      • Clothes drying racks
      • Diy cushion bedhead
    • LIVING ROOM >
      • Hanging the TV to the Wall
      • Adding lights to a green wall
      • Cabinet for AV equipment
      • Mini-pond for goldfish
    • CUPBOARDS AND BOOKSHELVES >
      • Cupboards & Bookshelves Basics
      • Build and Hang a Cupboard to the Wall
      • Build a Bookshelf
      • Building a bathroom cabinet
      • Wall to wall wardrobe
    • CAR >
      • Matra Rancho Renovation
      • How to buy and rebuild a used carburetor
  • DIY Cook
    • Spices and condiments
    • Utensils and non-food items
    • Fish & Sea Food
    • Soups, starters and side dishes
    • Lebanese and Mediterranean Mezze
    • Main courses
    • Coffees and breakfast
    • Desserts and pastries
  • Cars tips & tricks
    • Mechanical maintenance
    • Electrical and Ignition repairs
    • Dependability and drivability
    • Auto detailing
    • Abandoned and old vehicles
    • Car Insurance and Regulations