Aristo autoreverser The wiring diagram on page 2 of the ART-11090/11091 Auto Reversing Unit shows the polarity for the diodes backwards. The page shows the stripe in the diodes facing left on the split rail gaps. The train (I use PCC trolleys) will not reverse with the diodes in that direction. With the stripe in the diodes facing right (split rail in front) everything works correctly. Inspecting Aristo rerailer / reversing sections with the diode wired in one can see that Aristo wired the diodes with the stripe to the right -- opposite the illustration. Another point is that the polarity from the reversing unit in the diagram on page 2 shows polarized power coming from the reversing unit to the track, with "+" on the split rail and "-" on the continuous rail. Actually, the output of the reversing unit is not polarized and flips polarity when the unit reverses the train. However, the wire from the upper reversing terminal should go to the split rail side of the tracks and the wire from the bottom terminal should go to the continuous rail.