I have a 2nd update on this issue. I put spare box on and it fired right up which was great. But when I went back to wire it up permanently with the proper connections i lost all spark and and the box started to emit a high pitched hum. I have no idea how, I had the battery disconnected. Anyway I have disassembled both boxes and I can definitely smell burnt wires when I open them up. Nothing visibly burnt however. Long story short, I just ordered a new Summit box, it is virtually identical and I just wired it up today. Truck runs great again!