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2004 Nissan Micra K12: Unprompted Activation of Front Wipers After Rainfall or Car Wash

Rogas28 12315 11
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  • #1 16968343
    Rogas28
    Level 2  
    Good morning everyone,

    I have a 2004 Micre K12. A month ago I had the following problem. After the engine is turned on, the front wipers start to wiggle automatically. Sometimes they walk a few times and stop, sometimes they walk for a few or even several minutes. The problem first appeared after a car was washed in a hand wash, and now it recurs after rainfall. I took out the fuse from the washer pump, but nothing helps (the same applies to the wipers). An interesting fact is that the wipers do not turn on after starting the ignition switch (aculumator), but only after starting the engine. Does anyone have any idea for self-repair, or is I waiting for a visit to a mechanic / electrician?
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  • #2 16969088
    piotrekwoj1
    Level 42  
    I think it is impossible without diagnostics. I don't think the switch will flood with water, maybe the BCM is defective.
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  • #3 16969184
    Rogas28
    Level 2  
    My guess is that the BCM module is responsible for more than just working wipers, and nothing else is happening to the car.
    I just noticed the front wipers stop moving a moment after the rear window washer is turned on. Of course, when I stop using it, they turn on immediately.
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  • #5 17080515
    diakov
    Level 2  
    The problem can be solved in a simple way by soldering the taj resistor as in the post https://www.elektroda.pl/rtvforum/topic1584294.html it was written by a colleague diodakus.
    I had exactly the same problem. The windshield wipers turned on automatically after the washer motor shorted against moisture. I soldered a 3k? resistor directly on the wiper switch board between the red and black cable, because I did not want to cut the insulation from the cables. These cables are the mass of the washers and + 12V. There is a lot of space on this PCB to solder this resistor. I attach photos for better illustration. After soldering the resistor, the problem never happened again and I did it over two years ago.
    best regards
    2004 Nissan Micra K12: Unprompted Activation of Front Wipers After Rainfall or Car Wash 2004 Nissan Micra K12: Unprompted Activation of Front Wipers After Rainfall or Car Wash 2004 Nissan Micra K12: Unprompted Activation of Front Wipers After Rainfall or Car Wash
  • #6 17080866
    Rogas28
    Level 2  
    Thanks for all the answers.

    It turned out that the windshield washer pump was the problem, causing a short circuit when wet. According to the mechanic, in this model the pump has some additional electronics, which started to freak out with moisture. There was an option to replace it with an original new one (cost about PLN 150), or a replacement used in micras for PLN 25. I used option no. two and so far for the last month everything was ok.

    best regards
  • #7 17081157
    diakov
    Level 2  
    Glad you managed to fix this problem. I'm afraid it wasn't for long because I also changed the pump twice and the problem kept coming back like a boomerang. In the end, I decided on a solution with a resistor and so far over two years and peace of mind. best regards
  • #8 18373091
    dawid5995
    Level 2  
    Rid up the topic, I just wanted to confirm that the resistor method works. I thought it would take place without removing the steering wheel, but unfortunately not. On the plus side, everything went smoothly and without problems. It started with the fact that with prolonged use of the washers, the wipers started to run automatically and recently, with heavy rain, the wipers turned on immediately after starting the car and this decided to insert a resistor in the system. 2004 Nissan Micra K12: Unprompted Activation of Front Wipers After Rainfall or Car Wash 2004 Nissan Micra K12: Unprompted Activation of Front Wipers After Rainfall or Car Wash
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  • #9 18377241
    dawid5995
    Level 2  
    My joy came prematurely. After installing the resistor, the battery is discharged overnight, where previously there was no problem with firing even after long stops ...
  • #10 18378329
    decybel91
    Level 42  
    I fought with such a case and the cause was the front washer motor. After the exchange, as he took with his hand.
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Topic summary

The discussion revolves around a recurring issue with the front wipers of a 2004 Nissan Micra K12, which activate unexpectedly after rainfall or car washes. The problem began after a hand wash and involves the wipers moving automatically for varying durations after the engine starts. Initial troubleshooting included removing the washer pump fuse, but the issue persisted. Responses suggest that the Body Control Module (BCM) may be defective, and a known solution involves soldering a resistor to the wiper switch board to prevent short circuits caused by moisture in the washer pump. One user confirmed that replacing the washer pump resolved the issue, while others reported mixed results with the resistor method, including battery discharge problems. The discussion highlights the importance of diagnosing the washer pump and BCM for effective repair.
Summary generated by the language model.
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