Cause of malfunction - Method of elimination
Wire wiper motor does not work
bimetallic fuse does not operate, and fuse F9 in the mounting block does not burn out
- Gearmotor power wires are damaged, wire tips in the junction blocks are oxidized
Check the wires, replace the damaged ones. Strip the tips
-Wire wiper switch is damaged
Replace the wiper switch in the steering column switch
- Electric motor brushes are stuck, the collector is heavily contaminated or burnt
Check, eliminate brush sticking or replace damaged parts; clean the collector
- Broken wire in the winding of the electric motor anchor
Replace the anchor or gear motor
The wiper motor does not work
The bimetallic fuse is triggered, or the F9 fuse in the mounting block burns out
- The wiper mechanism levers are deformed and touch the body parts
Replacement and repair of the windshield wiper is discussed in the article - "Replacement and repair of the windshield wiper"
Check, straighten the levers or replace the windshield wiper
- The brushes are frozen to the glass
Separate the brushes from the glass, avoiding damage to the rubber band
- A foreign object has gotten into the wiper mechanism
Check, remove the object
- Short short circuit in the winding of the electric motor armature
Replace the gear motor or the electric motor armature
The windshield wiper motor does not work in intermittent mode
- The windshield wiper switch is damaged
Replace the windshield wiper switch in the steering column switch
- The windshield wiper relay is damaged
Replace the relay
The electrical circuit for connecting the windshield wiper motor and the operating principle are discussed in the article - "Features of windshield wiper operation"
The windshield wiper motor does not stop in intermittent mode
- The windshield wiper relay is damaged
Replace the windshield wiper relay
- Poor contact of the contact petals of the limit switch to the gear motor gear
Bend contact petals of the limit switch
- Contamination of the limit switch contacts in the gear motor
Clean the switch contacts
The wiper motor is running, the brushes are not moving
- Broken teeth of the gear motor gear
Replace the gear
- Weak fastening of the crank on the gear motor gear shaft
Check, tighten the crank fastening nut, setting it in the end position