Hello.
There has recently been a problem with the rear window wiper not always working. After switching on, the wiper can work e.g. 5x and then stops, it suddenly works again, etc. It just works as it pleases. My observations and initial diagnostics:
- after switching on the ignition on the pin 1 (in the photo) appears + 12V not dependent on the position of the wiper handle,
- on pin 4 there is a transition to the body weight,
- when the wiper is working properly, pin 3 appears by + 12V pulse and pin 2 is constant voltage + 12V until the wiper makes a full movement, then again impulse appears on pin 3 and the cycle repeats (i.e. at that moment everything OK),
- when the wiper does not work (and should) on pin 1 is +12, but on pins 3 and 2 there is no voltage,
- after shorting pins 1-2 or 1-3, the wiper works every time, i.e. the engine is rather fine,
- when the wiper does not walk, even switching on the front wipers + reverse does not help, so the handle is rather good,
- each time you turn the rear wiper switch, you hear a relay under the steering wheel (even when the wiper is not working).
To sum up, the problem is the lack of impulse on pin 3 which allows the wiper to work. I tried to move the plugs in the tailgate, I moved the bundles, but it has no effect. What else can I check? Can it be fixed somehow?
There has recently been a problem with the rear window wiper not always working. After switching on, the wiper can work e.g. 5x and then stops, it suddenly works again, etc. It just works as it pleases. My observations and initial diagnostics:
- after switching on the ignition on the pin 1 (in the photo) appears + 12V not dependent on the position of the wiper handle,
- on pin 4 there is a transition to the body weight,
- when the wiper is working properly, pin 3 appears by + 12V pulse and pin 2 is constant voltage + 12V until the wiper makes a full movement, then again impulse appears on pin 3 and the cycle repeats (i.e. at that moment everything OK),
- when the wiper does not work (and should) on pin 1 is +12, but on pins 3 and 2 there is no voltage,
- after shorting pins 1-2 or 1-3, the wiper works every time, i.e. the engine is rather fine,
- when the wiper does not walk, even switching on the front wipers + reverse does not help, so the handle is rather good,
- each time you turn the rear wiper switch, you hear a relay under the steering wheel (even when the wiper is not working).
To sum up, the problem is the lack of impulse on pin 3 which allows the wiper to work. I tried to move the plugs in the tailgate, I moved the bundles, but it has no effect. What else can I check? Can it be fixed somehow?
