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I drew up a schematic of the system. I had to shrink the file down, it may be a little hard to read.
Blue wire gets the 12v+ from the ignition switch(armored cable) and delivers it to the module and the ballast resistor.
Brown wire from the ballast, carries the lowered 10 volts or so to the coil +. This wire also goes to the second small terminal on the starter (the other small wire is green?), to get the full 12 volts to the coil during starter cranking. If you are using the armored coil, the brown 3-ended wire, the diode, and ballast are not used.
If you use the bosch coil that requires the ballast resistor, Brown wire goes from ballast to coil positive and the secondary terminal on the starter. I think the diode is only required if the starter is lacking the extra terminal. In that case, the stripe on the diode should be on the side connected to the brown wire to the coil. It prevents reverse voltage flow from the ballast to the starter, which would cause it to run continuously. You'll know soon enough if your connection it reversed.
On the vclassics installation, it appears they are powering the module from the fusepanel. I believe the switched fuses lose their power when the key is turned to the start position (to allow maximum power to the starting system). They have the diode connected to supply power via the green wire on the starter when the key is in the start position, and then from the fuse panel in the run position. It would work, but is hardly ideal. Without the diode to the starter, the module would lose power when the key is turned to start in their diagram. http://www.vclassics.com/archive/breakerless.htm
White wire to coil negative.
Black wire to a good solid ground, star washer recommended for best connection.
The grouped brown and green wires go to the dizzy magnetic pickup coil. Easy one!
I hope some of that made sense.
I am using the electronic dizzy, with a gm 4-pin HEI module, and MSD Blaster SS coil. No diodes in my setup. I have the Cigarette Lighter wired as a Starter Button with a relay to the starter. I connected power to the module and coil from the connection on the ignition switch that is Hot when key is in Run position. Because i use the starter button, the coil and module still see power when i'm starting.
If you purchased the diode from IPD i would definately give them a call. They have always been more than helpful with any questions i've had.
much respect,
curtis m. white
http://thirdchoice.com
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