Why won't my windshield washer not work,yet my wipers work. The rain sensor is not working and GM dealer said that washer will only work if sensor working. kinda dangerous this time of year. My ca

Do you know what a wiring diagram is ? A wiring diagram for your vehicles windshield wipers electrical circuit would show all components involved . You would need a wiring diagram for testing ,so you know which wires too test . It would show the fuse location - amperage etc.... Which of these is your vehicle - Notchback or hatchback or station wagon .

xTooltipElement
Service Information
2008 Holden Viva ' Optra, Viva (VIN J) Service Manual ' Body Systems ' Wipers and Washers ' Schematic and Routing Diagrams ' Document ID: 1964803
--------------------------------------------------------------------------------
Wiper/Washer Schematics
Figure 1: Wiper System - Notchback
Figure 2: Wiper System hatchback and Station Wagon
Figure 3: Wiper System Hatchback and Station Wagon w/Intermittent
Figure 4: Wiper System Notchback w/Rain Sensor
Figure 5: Wiper System Hatchback and Station Wagon w/Rain Sensor
Figure 6: Wiper System Hatchback and Station Wagon w/Intermittent and Rain Sensor
© 2019 General Motors Corporation. All rights reserved.

The fuse would be marked WPR fuse # 9 25 amp. located in the IP fuse panel . IP - instrument panel fuse box . It's location is
Fuse Block - I/P
Behind the left side of the I/P access panel
Windshield Wiper System
The windshield wiper system consists of a wiper motor, a linkage, a wiper arm and a blade, and a wiper/washer switch. The windshield wiper circuit incorporates a self parking device which consists of a worm gear and a cam plate in order to keep the circuit engaged temporarily when the switch is turned off. The wiper system is driven by a permanent magnet-type motor. The windshield wiper motor is mounted on the dash panel and is directly connected to the windshield wiper linkage.
The windshield wiper motor has 2 speeds, LO and HI, and also has intermittent wiper capability. The wiper switch is an integral part of the wiper/washer switch. Windshield wiper operation is actuated through the lever on the right side of the steering column.

https://www.youtube.com/watch?v=MvXX3Xg3siM

If you want to bypass it, I suggest you run a couple of wires from the battery, via a switch, directly to the washer motor. To verify what the dealer has told you, take it to another dealer or independent repair shop and get them to diagnose the problem.

does the washer pump work.

Hi,
The 'stalk' that controls all these functions is faulty. Your truck SHOULD still be under warranty...Take it in.

GL,
Td

Make sure wiper arms are tight they are on a spline also where the wiper arm transmissin conects to the wiper motor therw is a nut that holds a z shaped bracket that losens up and oblongs the rectangular slot so the wipers stop with the least resistance.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/craig_a14a43e01fd0835a

replace wiper motor the seal on motor is bad water entered and shorted at motor then dried.honda had a recall for same problem.

a couple of thoughts:
Has your windshield just been replaced?
The sensor is up by the rear view mirror, is it plugged in all the way?
Do you have the right size wiper blades on your vehicle? (too short of a blade misses the rain sensor and does not wipe it clean)
How good are your blades? ( as above, to turn off the rain sensor the blade needs to wipe it clean)
The rain sensor works by projecting multiple inferred beams to the inside of the windshield, like a prism, they reflect back to collectors. when there is a water droplet on the outside of the windshield it changes a beams trajectory and it misses the collector thust turning on the wipers.
(yes, this all happens in that little sensor up by the rear view mirror.)
check to make sure the wiper switch is in the right position.
also....I've seen rain sensors not work properly when the hood or doors are open.
hope this helps

there is a little motor in the waser bottle that needs replaced there cheap at auto zone

My 98 suburban did the same thing (has intermittent wipers I assume) I had to replace the wiper motor. AutoZone had a rebuilt one for $50. ($279 at dealer for a new one)