These wires pop out of the OE wire harness and I will trace back this weekend. I looked at the wiring diagrams for late models and didn't see these wires is what has left me head scratching. Mine is #9193 and I don't have a ballast resistor. Prior owner had these wires attached to + side, so I left them. When I install the Duraspark I was planning to power the choke directly from the hot output of the relay.