[Robert]

Be sure that the wire connection at the underside of the points plate (which is the wire from the lower plate) is insulated with the proper disc shaped cardboard insulator... otherwise it can go to earth on the upper plate if disturbed. If you are using the 'modern connector and lower plate'-THROW THEM AWAY. At sometime in the future, the connector WILL shift and earth itself to the upper plate. This condition will put you on the side of the road...in my case, the first location was my driveway, the second location was the bike path of a BRIDGE...I was a slow learner that most of HENRY'S systems were well thought out and executed. Good luck, Andy