https://www.forabodiesonly.com/mopar/attachments/img_4787-png.1715251248/[/mg]
This is also partially wrong because of the reference to the yellow colored wire to the start relay. That wire is also unchanged in reality. It is supposed to be the coil/ bypass circuit IE ign2, which goes from the coil+ side of the ballast to the ignition switch IGN2 contact. it supplies power to the coil/ ignition for starting and bypasses the ballast
If you are ADDING a 4 pin ECU / breakerless system here are the basics Numbers are simply enumerators not pin numbers
A...GROUND ECU box MUST be grounded. MUST
B&C..........distributor pickup
D...............power to ECU. This goes to the "high" side of the ballst, IE directly from the key IGN1. This point also branches off under the hood and supples alternator field (blue), VR IGN terminal (blue) electric choke if used, and sometimes smog devices
E...........Coil NEG........this wire goes to coil - and switches the coil on/off just like the points did
