Terminal designations
The designation of the terminals of the windshield wiper motors is standardized.
Windscreen wiper motor:
- Voltage for the first windshield wiper speed is supplied to terminal A1.
- Positive potential (+) is applied to terminal A2 to set the windscreen wiper to the initial (final) position. Voltage is applied to the sliding contact (brush) of the motor until it stops after the corresponding "command" is given by the driver or the central switching unit.
- Terminal B1 supplies voltage for the second speed of the windshield wiper (shunt winding).
- Terminal C1 brakes the electric motor after the windshield wiper is switched off to prevent the windshield wiper from passing the parking position.
- Terminal C2 is "ground" (-) (see illustration 7.0).
7.0 Windshield Wiper Motor Terminal Assignment
Rear Window Wiper Motor. Power Plug 3-Pin:
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- Positive potential (+) is applied to terminal 1.
- Terminal 2 is ground (-).
- A positive potential (+) is supplied to terminal 3 to set the windscreen wiper to its initial (final) position.
Checking the windshield wiper motor
First, find out what is wrong: the motor or no voltage to it. To do this, proceed as follows:
1. Disconnect the multi-pin plug from the electric motor.
2. Power the electric motor by running 2 auxiliary wires (+) and (-) from the battery.
Run one wire from the positive battery terminal to terminal A1 or B1 (at the rear window wiper motor to terminal 1), and run the second one from the negative pole of the battery to terminal C2 of the windshield wiper motor(at the rear window wiper motor to terminal 2).
The windscreen wiper motor should now operate, depending on which terminal is supplied with power, at speed 1 or II. If this is not the case, the motor or one of the motor rotation stages is faulty. Remove the motor, see the relevant chapter.