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their is a known defect in the wiper switch please read following and check out site as well as print and bring into the dealer they will make good on it
Summary:
ON CERTAIN PICKUP TRUCKS AND SPORT UTILITY VEHICLES, A STATIC
ELECTRICITY SPARK BETWEEN THE OPERATOR AND THE VEHICLE CAN CAUSE THE
TURN SIGNAL, HEADLAMPS OR WINDSHIELD WIPERS TO MALFUNCTION WITHOUT
WARNING.
here is the site for the recall information, as a computer tech i can tell you this is suposed to be static isolated but it is not. they dealer should make good.
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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 .
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.
If the pump works, something should be flowing thru the hose to the spray nozzles. And if the pump works, everything electrical is working. How do you know the pump works ?
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 multipleinferred 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
Your windshield wipers come on because of the position that the wiper control is set. Wipers will come on intermittently if you set it for light rain or snow or it can be set to come on immediately and fast for hard rain or snow. Please make your windshield wiper adjustments by turning the control knob or lever to the desired position.
The 13mm nuts that attach the wiper arms to the pivot assembly loosen with time. Pop up the plastic caps and tighten the nuts. Make sure the wipers are in the park position i.e. set the wiper switch in the off position before shutting the ignition off - otherwise you might tighten the wiper arms in the wrong position and they would try to go places they shouldn't :)
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