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  1. M

    Accidentally revert the battery polarity

    As soon as i get it:-) My frustration is how with all the advances in electronics there is still low cost protection for this scenario as this can easily happen when time comes to replace the battery. I remember from my long dated electronic class that zener diode could be used but i haven t...
  2. M

    Accidentally revert the battery polarity

    Yeah. I actually ordered it:) I liked the challenge with the hope to get some help in the forum experts which you certainly did...
  3. M

    Accidentally revert the battery polarity

    Ok. In previous replies I interpreted that you meant might somehow connect to the relay directly. But if the board has other driving components which is probably the case as you can see with tiny surface mount transistors ...then it gets more tricky.
  4. M

    Accidentally revert the battery polarity

    Got it but I am not sure why a relay would burn due to battery polarity inversion( although I am pretty sure you are right that is toast...) about this: "PWM is what is used to control motor speed and/or current. If it's literally only a switch for a throttle, then there may be no PWM, or only...
  5. M

    Accidentally revert the battery polarity

    forgot to mention: when I replaced the battery with correct polarity, the relay did not click.... so your analysis might be correct but I will test it out and tried to bypass it unless any new suggestion.
  6. M

    Accidentally revert the battery polarity

    The razor rider uses a SINGLE 12V battery so I am not sure about some of the points: can you clarify? 1. "But this is a 14v relay (probably both coil and contacts), and if there's two SLA in series, then it's being used at 24v (28v fully charged), so the coil is being overheated by too much...
  7. M

    Accidentally revert the battery polarity

    thanks for the suggestions. I will check the 5V on the throttle but I don't think there is a LM 7812 or 317 as I couldn't see any. I attached the picture of the zk1218 controller and it's board.
  8. M

    Accidentally revert the battery polarity

    hi, I accidentally reverted the battery polarity on the ZK1218 controller for a Razor powerrider 360 when replacing a new battery .( my kid is left without his favorite ride now :( ) And so even if I re-installed the battery with correct polarity the pushbutton throttle doesn't start the motor...
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