Why does the car wiper not work? / Guide to solving the wiper problem + photo

According to the online economy report, failure Wiper And the lack of proper cleaning of the glass can sometimes end up being very detrimental to the driver in critical situations. Snow wipers generally require little maintenance and the cost of their repairs and maintenance is also small, so it is better to take its problems seriously and try to solve them in time.

Loves the cleanliness of the windshield

The basis of the general operation of the wiper is simple. An electric motor, with the help of a small gearbox, moves the main arm of the wiper back and forth, and the linear movement of the arm is converted into the reciprocating movement of the blade arm. The wiper motor assembly and its rods are generally embedded in the stud part under the windshield.
The wiper motor uses an auxiliary rod with a mechanism similar to a connecting rod to create reciprocating motion. This lever converts the rotational movement of the motor shaft into the linear movement of the main arm.
To start the snow blower motor, we need a control circuit or so-called timer circuit. In older cars, the timer circuit is mounted inside the dashboard as a separate control hardware assembly. In some cars, the timer circuit is integrated with the wiper assembly (such as Pride). In newer cars (such as Thunder 90, Peugeot 206, and most of today’s modern cars), there is no independent timer circuit, and the central control module (BCM) initiates different wiper modes by software.
Whether the timer circuit is hardware or its function is defined in software for the BCM, it helps us to define different working modes for the wiper. In general cars, these modes include the definition of different speeds for the engine and a mode known as timer or automatic mode in which the wiper moves back and forth with a time delay. In some cars, the time interval of the automatic mode is fixed, and in some cars, it depends on the speed of movement. In some cars, you can manually adjust the value of this delay by turning the degree installed on the wiper lever.
Public Wiper have a member called zero position plane. This plate, which is installed inside the wiper motor, defines the idle position of the blades. So if we switch the lever to the off position when the wipers are in the middle of their travel, the wipers will not stop and will continue to move until they reach their normal position and then stop.
Some cars have rain sensors. This sensor can be an infrared optical type with a transmitter and receiver to detect water drops, or it can work based on ultrasonic waves. In these cars, the snow wiper working modes are automatically started depending on the intensity of the rain.

Troubleshooting the wiper system

System defects Wiper It does not have a lot of variety and in most cases its problems are summarized in the depreciation of the blades, but there are also some problems that should be identified and fixed if they occur.

The blades are dragged on the glass with a clumsy sound

The loud and unusual sound of the blade dragging on the surface of the glass is a sign of aging and wear of the blade’s rubber. This problem also occurs if you don’t use the right glass salt liquid or if the glass has a lot of pollution (especially viscous pollution such as tree sap) and its surface is dry. It should be kept in mind that apart from raining conditions, never turn on the wiper without using windshield wipers because the life of the blades is greatly reduced and there is a risk of scratching the glass surface. Sometimes the metal core that holds the rubber of the blade comes out of its place and is scratched on the surface of the glass. If you see this, replace the blade before serious damage occurs to the glass.

Wiper does not work

If none of the wiper modes work, first check the health of the wiper power supply fuse and the wiper motor fuse. If the power supply fuse is healthy, the timer circuit may be damaged, or the wiper motor may have run out of coal, or its body connection may be disconnected. In cars that have BCM, these defects can be observed with the help of a diagnostic device. Sometimes it is possible that the wiper motor is stuck due to reasons such as frost on the glass surface or mechanical jam in the lever, the system has entered the protective mode and the BCM does not allow the wiper to operate. If some modes of the wiper do not work (for example, the high speed does not activate), you should go to the wiper motor and the timer. Some cars have separate fuses for the slow and fast states of the wiper motor, burning one of them will cause the corresponding speed not to work. Failure of the timer circuit, disconnection of the wires on the road, loosening of the connection of the bodies or failure of the contacts of the wiper handle itself is also a problem. creates

The wiper does not work properly and the engine makes an unusual noise

The slowness or confusion of the wipers along with the unusual sound of the engine indicates that the wiper motor mounts are loose. The wiper motor uses its legs as a support to move the blades properly. The unusual sound of the wiper motor can also be a mechanical sign or failure of the carbons.

A salt glass eyelet does not distribute water correctly

With the help of a needle, you can adjust the correct spraying angle of the eyes. Sometimes congestion and deposits inside the eye can cause incorrect spraying. A thin metal wire can be used to remove the blockage.

Salt glass does not work

Some cars have an independent fuse for the windshield washer pump, so check the condition of the fuse first. With the engine off and the switch open, the sound of the pump is heard. Therefore, if you hear the sound of the pump and the water does not come out, the liquid in the tank may have run out, or the transmission hose may have leaked and disconnected from some point. The failure of the pump itself is a sign that the socket is broken or the engine itself is burning. If the wipers do not activate at the same time when activating the windshield wipers, the internal contact of the wiper handle itself may be damaged and does not issue a command, or the timer circuit may be faulty.

The screws of the motor snow blower must always be tight

The blades are only allowed to move when the glass surface is wet

Different states of improper operation of the blades, which is a sign of the end of their useful life

The direction of spraying the eyes can be adjusted with a needle