The blue wire feeds the ballast resistor and voltage regulator. It is hot in the key on position, but dead in the crank position. The brown wire feeds the coil, it is hot only in the crank position. The brown wire is designed to feed the coil 12 volts during cranking. The blue wire goes to the inlet side of the ballast, the coil + wire and the brown wire should be on the outlet side of the ballast when using a factory style ECU (4 or 5 pin. If using a MSD style box the brown and blue are tied together to feed the ignition on wire of the MSD. make sure the ECU and the voltage regulator are well grounded. A poor ground of the voltage reulator will cause an over charge condition.
Doug