Beja if you have a multimeter it would be real easy finding out which side the diode is on, you should get about 0.7 volts on the side of the diode, set your multimeter to measure diode, the black lead should go on the anode and the red lead should go to the cathode.Hi Klaus,
thanks and this is what I am getting (see picture).
thanks Walterf25.. the problem is that the part is not marked at all.
I am switching to hall effect magnetic sensor instead..