I have a Golf V model 1999 and after replacing the wiper motor and wiper movement arm, I have trouble aligning the wipers so that they start at the bottom of the screen. Does anyone know is there a tip for setting the movement arm in a certain place on the motor (a so-called Zero/null start point) for the motor?
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first remove the both wiper arms. switch on the ignition & switch on the wiper system, then switch off the wiper system & ignition,then you can align the both wiper arm in proper poction,bottom of the windscreen guard,
WIPER ARM LINKAGE COULD BE BINDING.REMOVE WIPER ARM TO SEE IF WIPER MOTOR OPERATE SLOWLY.IF YES CHECK TO MAKE SURE WIPER MOTOR GETTING GOOD GROUND CONNECTIONS BY CHECKING MOVING WIRES .IF WIPER MOTOR SPEEDS UP YOU HAVE GROUND WIRE PROBLEM. IF WIPER MOTOR REMAIN SLOW GROUND WIRES CHECK OUT OKAY.REPLACE WIPER MOTOR.IF WIPER MOTOR RUN FAST NORMAL SPEED AFTER DISCONNECTING WIPER ARM.WIPER ARM LINKAGES IS BINDING OR NEED SOME LUBRICATION TRY WD40 SEE WHAT HAPPENS.LUBRICATION DONT HELP WIPER LINKAGE COULD BE DAMAGED.
They (the wiper motor and mechanism) are underneath the cowl vent screen.
To replace the motor and mechanism:
1: Turn the ignition to the on position with the wipers at low speed. When the arms are point straight up, turn it off.
2: Use a small screwdriver and pry the plastic caps from the wiper arm mounting ends.
3: Disconnect negative battery terminal
4: Remove the small retaining nup from each wiper arm, then the arms.
5: Remove the cowl screen by turning the eight plastic retainers 1/4 turn counterclockwise. Next remove the six screen retaining clips. If it's a 2000 or later, remove four bolts that secure the arm monting bar so that you can access the wiper motor.
6: Disconnect the electical connections and remove the four screws that secure the motor and mechanism to the cowl, and take out the motor-mechanism assembly.
7: The drive mechanism isn't serviceable, but the motor can be replaced. Remove the operating arm nut from the motor shaft, and remove the three screws that hold the motor to the drive mechanism.
8: Reinstall the wiper mechanism into the cowl and connect the electrical connectors. (Before reinstalling the wiper arms and blades, turn the ignition to the on position and turn the wiper switch to either LO or HI, then turn the wiper switch Off. This lets the motor cycle to the park position thus avoiding damage to the arms and drive mechanism).
9: Install the wiper pivot arms, ensuring the blade tips align with the park reference mark at the base of the windshield.
10: Ensure that your wiper blade is fully seated on the wiper arm before operation the wipers.
The routine (resistor) that shuts off the wipers and parks them correctly is in the wiper motor, not the switch. I assume your switch is good since you make no complaints about its movement. One thing to check before replacing wiper motor is to loosen the wiper arms, and let the motor park itself in what you feel is the bottom of windshield position. Now align the wipers and retighten.
If these get positioned wrong after, say, a frozen morning, this will affect parking of wipers since motor "park" is no longer in synch with wiper arm "park."
Otherwise, if wiring and positioning are correct, I recommend replacing the wiper motor itself.
with wiper on try to wiggle the wiper arm with your hand. if motor is stuck this will sometimes jar it loose. you may need to do this for a minute as the wiper is a delay system. also if you can move the arm thru its sweep then it is just the wiper arm loose if this is it remove cover at base and tighten nut
take out the bolt out of the wiper arm and check the spline, if the spline appears to be worn out, replace the wiper arm and tighten it. take caution in tightening the bolt for you might crack the windshield. goodluck!