2.9. Diagnostics of malfunctions of a screen wiper

Cause of defect

Elimination method

The electric motor of a screen wiper does not work

Wires are damaged, their tips are oxidized or put leaky on, the safety lock No. 2 fused (No. 1 if back door glass cleaner does not work)

Press out plugs, replace faulty wires, a safety lock. Remove the cause of its burn-out

Brushes froze to glass

Having turned the ignition key in situation "is switched off", carefully separate brushes from glass, be convinced of integrity of a rubber scraper, restore mobility of connections of a brush

Between moving details of a crank the foreign subject got

Check correctness of installation of levers, correct the deformed levers or replace a screen wiper

The understeering switch of a screen wiper is faulty

Replace the faulty switch

Electric motor brushes hanged, the collector is strongly polluted or burned slightly

Eliminate lag of brushes, smooth out a collector a glass skin, wipe with the fabric moistened in gasoline. At strong wear replace a motor-reducer

Break or short circuit in an electric motor anchor winding

Replace a motor-reducer

The electric motor of a screen wiper does not work in the faltering mode

The screen wiper relay is faulty

Replace the relay

The understeering switch is faulty

Replace the faulty switch

The electric motor of a screen wiper does not stop in the faltering mode

The screen wiper relay is faulty

Replace the relay

The contact plate of the trailer switch of a motor-reducer is not unbent when passing a cam

Sort a motor-reducer and turn in a contact plate or replace a motor-reducer

Contacts of the trailer switch are oxidized

Smooth out contacts or replace a screen wiper motor-reducer

Brushes stop in any situation

Contacts of the trailer switch badly nestle or are oxidized

Smooth out contacts, if necessary turn in a plate of the switch or replace a motor-reducer

The nut of fastening of a crank on a motor-reducer shaft weakened

Having correctly established a crank, tighten a nut (it is desirable to apply previously on a carving paint or anaerobic sealant)

The electric motor of a screen wiper works, but brushes do not move

The nut of fastening of a crank on a motor-reducer shaft weakened

Having correctly established a crank, tighten a nut (it is desirable to apply previously on a carving paint or anaerobic sealant)

Motor-reducer gear wheel teeths are painted

Replace a motor-reducer