Thanks so much Howard. We are going to attempt to put the coil back on today and see what happens. There are several wires hanging loose and we were not sure of where to connect them. The wiring diagram is great to have. I don't know what we will do if this coil is bad. Have no clue where I might find another one. I saw an Atwater-Kent coil on e-bay, but it was for a six or eight cylinder car, don't know if that matters. This car has two 6V batteries. We did find a ser# for the car. According to the information you sent, the car is a 1917. From what I read in one of my car books, Maxwell went to a coil from a magneto late in that year. The coil bracket on the car surely looks original to the car.