10.1.17. Possible malfunctions of a screen wiper and ways of their elimination

Possible malfunctions of a screen wiper and ways of their elimination
Cause of defect
Way of elimination
At inclusion the screen wiper does not work
There is no contact in connecting blocks
To check reliability of connections and to eliminate malfunction
The switch does not work
To check and repair it
Lag of brushes or pollution by electric motor anchor collector dust
To disassemble the electric motor, to eliminate lag of brushes. To smooth out a collector and to clear grooves between collector plates
The safety lock owing to jamming of levers of the drive, jamming in a reducer or malfunction of the electric motor fused
To find a cause of defect, to eliminate it and to replace a safety lock
Wear of a worm gear wheel of a reducer
To replace a worn-out gear wheel
In operating time of a brush strike in body details
Levers are incorrectly installed
To change installation of levers
The wrong provision of brushes after switching off of a screen wiper
Levers are incorrectly installed
To install levers of brushes (see <maintenance of a screen wiper>)
The screen wiper works only at one speed
Lag of a brush of the electric motor or malfunction of the switch
To eliminate lag of a brush, to check the switch and if necessary to repair