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Are they working when not raining? two things to consider 1 is water getting into the electrical lines and 2 is the switch bad. Need to check both. if there is a connector to remove for the wiper motor and it has two wires simply put 12v to those wires and see if the motor runs. then i would suspect the switch. If this helps please reply as this helps me keep answering questions here and good luck
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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.
Have you lined up the wipers properly on the windshield? There’s a small black line on the windshield that helps you to line up the wiper arms when you reinstall them on the drive spurs. That may be the issue. If you’ve changed the wiper motor and not messed with the wiper transmission, the timing could be off. If the wiper motor is slotted into the wiper transmission, it may be clocked 180 degrees off, giving you the issue.
From your posting, I assume you replaced the O2 sensor before and the one after the cat converter. If you missed one, replace it. Otherwise, you need to look at the signals from these using an upscale code reader to be sure the ECM is getting correct readings. If the readings are a problem, you will need to check the connectors and wiring between these and the ECM (hopefully it's not the ECM itself).
As far as the windshield wipers are concerned, if they work correctly at the full on position, what you are experiencing may be normal - you probably have a rain sensor on your windshield that takes over at lower wiper switch settings. If not, check the connectors at the motor (you may also have a failing logic board in the motor housing).
the wiper motor is going out have it fix befor you get cought in a big rain storm with no wipers.i had the same problem.also check to see if water is geting inside the motor ok
May want to look at replacing the wiper circuit board.It is located on the firewall adjacent to the wiper motor and has a some what square black cover with 3 torx screws and wireing harness pluged into the side.We had a truck that every time you washed it the wipers would stay on until it dryed out.You can try removing it and spaying it down with contact cleaner just watch the brease on the two contact tips.Well hope this helps.
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)
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