I have a postwar 313 Bascule bridge that is working well except that the motor does not continue to run throughout the up-down cycle. The 96c button must be held down for the entire cycle to engage the motor instead of the motor continuing to run after the bridge begins to lift and then automatically stopping at the end of the cycle. The bridge passes all continuity checks except the following: When the bridge is up, there is no continuity between bridge binding posts 2 and 3. I have used an emery board to clean the switch wafers, sprayed them with Radio Shack contact cleaner, and tried to bend the wafers as recommended in Ray Plummer's January 1995 CTT article. I did not want to poke too vigorously on the switch wafers for fear of dislodging the spacer between plate 4 and 5. I have read enough here and elsewhere to know I don't want to take the bridge apart.
Thanks in advance for any advice on this problem. If anyone has a wiring diagram from the bridge binding posts to the switch, I would appreciate receiving a copy.
