As cars enter millions of households, wipers, as a key component to ensure the safety of driving on rainy days, are often troubled by problems such as “not in place” and “stuck in the middle”.Many people don't know where to start when facing a failure. They either blindly diy and cause damage to the parts, or they directly send them for repair and spend more money.

This article combines the four dimensions of fault mechanism, step-by-step operation, model differences, and emergency response to supplement practical content to help you comprehensively solve the problem of wiper motor reset.

1.Understand first: the core principle of the wiper reset system

The wiper can be accurately homed, relying on the synergy of “motor drive + reset switch control”: the motor provides power to drive the connecting rod mechanism, so that the wiper arm swings back and forth; the return copper ring inside the motor cooperates with the contacts, or the control module of the smart model will send a signal when the switch is turned off, allowing the wiper to accurately stop at the “parking position” at the bottom of the windshield.

Simply put, the essence of reset is “after the motor receives the stop signal, it drives the wiper to complete the last ‘homing stroke’”.When there is a problem with this signal transmission, mechanical transmission, or circuit connection, the reset will fail.

2. Precise positioning: the 7 core reasons why the wiper is not in place

● Foreign body stuck:

The typical symptom is that the wiper is suddenly stuck, and it stops halfway after the switch is turned off; during the investigation, it is necessary to focus on checking whether the gap between the wiper rubber strip and the glass and the connecting rod is mixed with leaves, stones, sand, dust or other debris. These foreign objects will directly hinder the normal return of the wiper.

● Aging / hardening of the rubber strip:

It is manifested as caton during the reset process, accompanied by abnormal wiper sounds (such as ”squeaking" sound), residual water marks or stains on the glass after wiper (not cleanly scratched); the troubleshooting method is very simple, observe whether there are cracks or gaps on the surface of the rubber strip, and touch it with your hand to feel whether the rubber strip loses elasticity and becomes stiff (normal rubber strips should be soft and tough).

● Insufficient hardware lubrication:

The main symptom is that the wiper reset speed slows down significantly, and the motor can hear a “dull feeling” when it is running, and even feel the motor "struggling”; it is necessary to check whether the wiper arm shaft (the part where the wiper arm is connected to the base) and the connecting rod ball head (the movable joint between the connecting rods) are dry and oil-free, and observe whether these parts have traces of rust-dryness or rust will increase frictional resistance, resulting in poor reset.

● Loose / misplaced connecting rod:

The swing trajectory of the wiper will become chaotic (for example, the swing amplitude of the left and right is inconsistent), and the reset position is unstable, sometimes high, sometimes low, and even stop on the side of the glass; during troubleshooting, you can gently shake the wiper arm to feel whether there is a loose gap between the wiper arm and the connecting rod, and observe whether the connecting rod as a whole is bent or deformed (bending the connecting rod will directly change the transmission trajectory).

● Reset switch / copper ring failure:

The wiper cannot be parked in a preset “parking position” (for example, parked in the middle or top of the glass). Even if the wiper switch is turned off in severe cases, the wiper will still rotate slowly (unable to stop completely); such failures need to be disassembled and inspected: on the one hand, check whether the “return copper ring” inside the motor (the key component that controls the reset signal) is worn and oxidized, on the other hand, check whether the contacts of the external reset switch (some models are next to the wiper motor) are oxidized and have poor contact.

● Circuit/fuse problem:

Either the wiper is completely unresponsive (does not move after power is turned on), or suddenly “power off” during the reset process (the wiper stops instantly); the troubleshooting steps are: first open the cabin fuse box, check the owner's manual to find the "wiper fuse”, and check whether the metal wire inside the fuse is blown (if it is blown, you need to replace the fuse of the same specification); then check the wiring harness interface of the wiper motor to see if the interface is oxidized or loose, and whether the wiring harness skin is damaged (oxidation or loosening can cause unstable power supply).

● Motor/control module failure:

If the motor does not run at all after power is turned on (a slight motor rotation sound should be heard normally), or if a “wiper system failure” prompt pops up on the dashboard of a smart model (such as a model with a rain sensor), there is a high probability that it is such a problem; during troubleshooting, after turning on the power, listen carefully to whether the motor has abnormal noise (such as “buzzing” sound but not turning, it may be the motor stuck; completely silent, it may be the motor burned down), smart models can use a diagnostic instrument to read the fault code and locate specific problems of the control module (such as abnormal module signal).

3. Step-by-step practice: 3 core methods of wiper motor reset

The operation steps in the original article are relatively single. The actual reset method needs to be selected according to the model type. The following is a complete plan covering traditional models and smart models.：

(1) General mechanical reset method (applicable to most fuel vehicles / old cars)

A. Tool preparation (supplementary details)

·Basic tools: slotted/phillips screwdriver (PH2 model is preferred), 8-10mm socket wrench, adjustable wrench；

*Auxiliary tools: neutral lubricating oil (lithium-based grease is the best, avoid corroding plastic parts with ordinary grease), marker pen (mark the initial position of the wiper), fuse extractor (spare).

2. Operation steps (optimize details + avoid pits)

● 1.Activate the repair mode (to prevent damage to the wiper arm): Turn off the engine, turn the wiper switch up to the top within 10 seconds and hold it for 3 seconds, the wiper arm will automatically rise to the middle position of the glass (some models need to be powered on and press the “RES” button to activate), to avoid direct deadlift caused by deformation of the arm bar.

● 2.Disassembly and marking: Take the rain wiper strip (pinch the buckle and gently pull it out), use a marker pen to draw an alignment line at the connection between the wiper arm and the shaft body (avoid reverse installation), unscrew the root dust cover, and loosen the fixing nut (do not remove it completely).

● 3.Adjust the position of the wiper arm: Manually push the wiper arm to the “parking position” at the bottom of the windshield (1cm from the lower edge), align the marker mark, tighten the fixing nut, and cover the dust cover.

● 4.Lubrication and testing: Apply a small amount of lubricating oil to the wiper arm shaft and connecting rod ball head, power on to test low-speed, high-speed, and intermittent gears, and confirm that it can be reset accurately after it is turned off.

(2) Intelligent system reset method (applicable to new cars with electronic control modules)

In recent years, smart models of Toyota, Honda, Volkswagen and other brands need to be electronically reset through the car machine or joystick. The operation differences of specific models are as follows：

● ·Toyota Corolla / Ralink: After turning off the fire, dial the wiper joystick up to the top and hold it for 5 seconds. After hearing the “click” sound, release it and the wiper will automatically reset and calibrate.；

● ·Volkswagen Lavida / Bora: After powering on, press the wiper switch to the ”OFF" gear, and press and hold the “water spray button” for 10 seconds at the same time. The dashboard shows “Wiper reset", and “Success" will be prompted after completion”；

● ·Honda Civic/CR-V: Go through the “Settings-Vehicle-Wiper System" of the car machine, select "Reset Calibration", and follow the prompts (make sure the wiper is in the initial position).

(3) Motor connecting rod reset method (applicable after replacing the motor / connecting rod)

If the wiper motor or connecting rod has been removed, the transmission angle needs to be re-aligned, otherwise the reset will inevitably fail.：

● a.Remove the deflector, expose the connection between the motor and the connecting rod, and use a marker pen to draw a through line on the motor gear and the connecting rod (alignment mark)；

● b.When installing a new motor, make sure that the through lines are completely coincident, and first screw 2 diagonal fixing screws (leaving a 1mm gap)；

● c.Manually rotate the motor shaft, observe whether the connecting rod swings smoothly, tighten all the screws after there is no caton, and finally adjust the position of the wiper arm according to the general method.

4. Emergency treatment: the wiper is stuck in the middle / cannot be closed?3 tricks to solve temporarily

If the wiper fails suddenly while driving, you can first deal with it urgently according to the following methods to avoid affecting driving safety：

● Stuck in the middle: forced homing method

·After powering on, adjust the wiper switch to “low gear”, and when the wiper is running to the bottom position, turn off the ignition switch immediately, and the wiper will stop in the parking position.；

·If it is invalid, you can remove the wiper fuse (refer to the vehicle manual to find the corresponding position), manually push back the wiper after interrupting the power supply, and reinstall the fuse after reaching the position.

● Cannot be turned off: power-off reset method

·Turn off the engine, disconnect the negative battery wiring, wait for 15 minutes (let the control module be powered off and reset), reconnect and power on the test, most smart models can return to normal；

·If it is still invalid, you can unplug the wiper relay (marked “WIPER” in the cabin relay box), temporarily stop the wiper operation, and send it for repair as soon as possible.

● Still stuck after reset: temporary lubrication method

·When the lubricating oil cannot be found, a small amount of soapy water can be applied to the connection between the wiper arm shaft and the connecting rod to temporarily reduce friction and relieve caton (special grease needs to be replaced in the future).

5. The boundary between DIY and professional maintenance: Don't carry these situations hard

Many car owners are struggling with “should they repair it by themselves”.

Which can be graded according to the difficulty of the fault.：

● Situations that can be handled by DIY

● Poor reset caused by stagnation of foreign objects and aging of rubber strips；

● Caton caused by insufficient lubrication；

● Mechanical adjustment of the position offset of the wiper arm.

Must be sent for repair:

● The motor has no running sound (it may be that the motor is burned down or the internal return copper ring fails)；

● Short circuit / wrong connection of the line (accompanied by repeated fuse fuses and odor)；

● Smart models report system fault codes (special equipment is required to read and repair)；

● Frequent misalignment after adjustment (it may be deformation of the connecting rod or failure of the control module).

6. Long-term maintenance: 4 key techniques to reduce reset failures

Instead of waiting for the failure to occur and then dealing with it, it is better to do a good job of daily maintenance to extend the life of the wiper system.：

● Regular cleaning and lubrication: wipe the wiper rubber strip with a damp cloth every month (to remove oil and sand), and apply lithium-based grease to the wiper arm shaft and connecting rod ball head every 3 months to avoid rust and caton.；

● Timely replacement of rubber strips: the life of the rubber strips is about 6-12 months, and they should be replaced immediately when cracks and scratches remain (boneless rubber strips are preferred for higher fit) to avoid hard friction damage to the wiper arm.；

● Correct use of maintenance mode: Before cleaning up the snow or replacing the rubber strips in winter, be sure to activate the maintenance mode to raise the wiper, and do not directly break the frozen wiper arm (it can easily cause the arm rod to bend)；

● Avoid "dry scratching”: It is strictly forbidden to open the wiper when the glass is dry. If you need to clean, you can spray the glass water first to reduce the hard friction between the rubber strip and the glass, and indirectly protect the motor and the connecting rod.

7. Frequently Asked Questions (FREQUENTLY Asked Questions)

a. After resetting, the wiper position is still high, how to fine-tune it?

Loosen the wiper arm fixing nut, gently push the wiper arm down to the ideal position (1cm from the lower edge of the glass), and tighten the nut.The fine-tuning amplitude does not exceed 5mm at a time to avoid misalignment of the connecting rod caused by excessive adjustment.

b. When the old car is reset, the motor has a "buzzing" sound. Is it a fault?

The high probability is that the hardware is under-lubricated or the connecting rod is rusty. First spray a rust remover to soften the rust, and then apply grease.If the noise still exists, it may be that the motor bearing is worn out, and the motor needs to be replaced to avoid complete failure.

c. After activating the repair mode, the wiper does not respond, what should I do?

Check whether the operation steps meet the requirements of the model (some old cars have no maintenance mode). If it is confirmed that the operation is correct or invalid, it may be a failure of the wiper switch or control module. It is recommended to contact a professional for testing.

The reset of the wiper motor may seem complicated, but in fact it follows the logic of “first troubleshooting simple faults, then matching the operation of the model, and finally controlling the maintenance details”.Mastering the fault location, step-by-step operation and emergency skills in this article can not only solve most common problems, but also avoid losses caused by blind maintenance.When driving on rainy days, a clear vision is the first line of defense for safety. Hurry up and collect these skills!