Windscreen wipers
Malfunction
|
Her reasons
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Your help
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A. Windshield wipers not working | 1. Defective fuse
2. Defect in the unload relay 3. Wiper drive crank disconnected 4. No continuity in the blue/red lead wire from the fuse box to the wiper switch 5. No conduction in motor wire to mass 6. Blown wiper motor 7. Faulty wiper switch |
Replace
Check Relay screw Check wire
Replace
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B. Wipers do not work in stage I | 1. Defect in terminal 53 of the wiper motor
2. No continuity at terminals 53a/53 in the wiper switch |
Replace motor
Replace switch |
C. Windshield wipers do not work in stage II mode | 1. No continuity in terminal 53b wire from wiper switch
to the engine
2. No continuity at terminals 53a/53b in the wiper switch 3. Defect in terminal 53b on the wiper motor |
Check wire
Replace switch Replace motor |
D. Windshield wipers only work in step mode II |
No continuity in terminal 53 wire from wiper switch to the engine | Check wire |
E. Windshield wipers do not return to their original position | 1. No continuity in terminal 53e wire between wiper switch
and engine (works through the wiper/windshield washer relay)
2. Faulty wiper motor |
Check wire
Check with a test lamp: between terminal 53a and ground, the lamp should be on constantly. Between terminal 53e and ground, the lamp must go out before reaching parking positions. When checking opposite between terminal 53e and positive battery, the lamp should come on before reaching the parking position. If not, replace the motor |
F. Windshield wipers not working at intervals | 1. Faulty washer/wiper relay
2. No continuity in the J terminal wire between the wiper switch and relay 3. Defect in the contact of terminal J in the wiper switch |
Replace
Check wire Replace switch |
G.
Intermittent wipers won't turn off
|
1. See E 1
2. See F 1 3. Contact J in the wiper switch does not open 4. Short circuit in terminal J wire to wiper switch |
Replace switch
Repair wire |
N. Windshield wipers do not wipe dry after bringing windshield washers | See F1 | |
I. Windshield wipers do not remain in position after switching off parking or stay short | Insufficient sliding contact in the wiper motor | Disassemble the wiper motor, clean the contacts. If needed, replace the engine |
Faulty wiper motor or lead wire?
To dismantle the wiper motor, you need to remove the left side of the black lining under the windshield. To do this, turn the rotary locks with a coin (1 and 2) to the left and remove both metal clips (3 and 4) on the bottom edge.
The windshield wiper linkage together with the motor can be removed from the box by rotation with the trim dismantled after loosening the three fixing screws (1–3).
In order to find out if the wiper motor or lead wire and switch are in order, the following test will help you:
1. Remove the wiper motor together with the linkage.
2. Disconnect the multi-pin connector on the wiper motor.
3. Now two auxiliary wires are laid. One from battery positive to terminal 53 or 53b (black/grey or green/yellow wire connectors).
4. The second wire is laid from the minus of the battery to terminal 31 on the wiper motor (where the brown wire was connected).
5. The wiper should now, depending on the terminal used, operate in stage I or II. If it doesn't work, then it's defective.
6. If it now works, then the defect is in the switch or the lead wire.
Removing the wiper motor
1. Switch on the ignition and move the wipers to their final position.
2. Remove the wiper arms.
3. Dismantle the left part of black plastic facing under a windscreen. To do this, turn the swivel lock a quarter of a turn to the left with a coin and additionally press out both metal clips at the bottom of the lining.
4. Unscrew the cover of the electronic box.
5. Loosen the two fastening nuts outside and inside on the bottom of the electronic box.
6. Remove the fixing pin of the electronic box from the lug and move the box slightly forward.
7. Unscrew two bolts with six-sided heads above on axes of screen wipers and one below on their engine.
8. Remove the linkage together with the wiper motor.
9. Disconnect the multi-pin connector on the wiper motor.
10. Press the control rods to the wiper axles.
11. Remove the three screws on the wiper motor. To get to all the screws, you need to turn the wiper motor crank a little further.
Installing a new wiper motor
To mount a new wiper motor or if the old motor has been removed from the mounting bracket:
The photo shows how the wiper motor crank (arrow) must be positioned during installation: it is parallel to the wiper arm control rod on the passenger side next to the driver.
This is how the sprayers of the glass washer system are correctly adjusted: a = 235 mm, b = 445 mm, c = 80 mm, d = 620 mm.
1. Connect the motor to the power supply and let it run for a while. Turn off and wait until it returns to the park position.
2. Mount the engine in the console, install the drive crank and wiper arms.
3. The control rod of the left wiper axle goes down to the engine crank, the rod to the right wiper axle fits on the engine crank from above.
4. Screw the drive crank so that it is in the position shown in the photo above.
5. If the drive crank is not fixed in this certain position, then the wiper arm will go down first at the beginning of the movement.
6. Mount the motor and linkage assembly.
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