The windshield wiper motor receives current through the appropriate fuse. The wire terminals on the wiper motor have the following meaning:
- 53 supplies voltage to operate the wipers in first speed.
- 53V supplies voltage to operate the wipers at second speed.
- 53A provides constant current to the wiper motor (responsible for the reverse movement of the windshield wipers).
- 53E, after turning off the wipers, causes them to return to the parking position and ensures that the engine is stopped in the final position.
Tip: With the ignition on, the wiper blades must not be blocked outside their parking position, for example by thick snow or freezing. In this case, voltage is constantly supplied from terminal 53A. Because the wiper motor cannot work due to the hung brushes, it burns out after a while. In such cases, you need to lift the brushes so that they can return to their original position.
Is the wiper motor or lead wire defective?
The following check will help to identify a malfunction in the wiper motor, in its wire or switch:
Expose the wiper motor as described in section «Removing the wiper motor».
Disconnect the multi-pin connector on the wiper motor.
Then two auxiliary wires are laid.
The second wire is routed from the battery negative to terminal 31 on the wiper motor (where the brown wire is).
The wiper motor should now operate in 1st stage or 2nd stage depending on the terminal used. If not, then it is faulty.
If it works, then the defect is in the switch or in the wire.
With the water repellent removed, you can see the wiper motor (3) with lever mechanism (2) and connector (1). The arrows show the mounting screws of the wiper motor.
Removing the wiper motor
Remove the wiper arms.
Unscrew the plastic nuts underneath.
Remove the rubber seal from the water repellent.
Remove the water repellent from the side clips and remove.
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