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I have built, installed and wired the HO double track swing bridge purchased from Walthers. However, I cannot get it to operate properly. If I set it on the base, partially open, it will swing in either direction. When it close completely and contacts the switch in the pier, it will not reverse. Also, when I am opening it, it will not stop once it trips the switch in the base. I have replaced the DTDP switch that is installed along the power source, but to no avail. Anyone out there have any suggestions? <br /> <br />thanks, <br /> <br />Kevin
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