Back-up Sensors

[Langabe]

Any idea where to check kung bakit ayaw na gumana ng sensors ko kapag naka reverse? Servitek in our area doesn't seem to know it either. Last option ko na siguro magpunta sa banawe, baka ma DIY ko :D TIA!

Check niyo din yun box Baka kasi naalis or yun posite & negative wire Kung naka connect.