Car wiring diagrams: Ford Resistor Wire Bypass, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. So I am running a pertronix with flame thrower coil. According to them, I need to bypass the resistor wire for a v switched source. According to the. If I am reading my schematic correctly, it looks like the resistor wire powers more than just the coil. So to power my new coil with a non resistant.I'm running a Pertronix conversion in the distributor, and I've always read about the need to bypass the resistor wire under the dash when doing this conversion..