1965 MMP's Barracuda Hemi swap! The Ever Changing Build

MonkeyMadness said
No it will not remove the need for the diode. the 65 has a 5 plug starter switch. The red wire is constant +pos power to the switch. When switching to (Acc or Run) power is Only sent to the Black/ Blue wire. When switching to (start) position power is Only supplied to the brown and yellow wires. Without a diode one circuit would not be supplied power while the other is keyed. And the idea of needing a starter switch while still using a key and key switch is just out of the question for me.

Yep, got that.

I guess my thought was if the brown and blue (or black) wire were tied together, any circuits on them would be powered in both run and run/start positions. This only works if the circuits on the brown wire don't care if they are powered all the time, so (in my mind) the brown wire would really only be used to power the circuits that would lose power when in the run/start position. So, the PCM would have key-on power in both key positions, minus any gap in the contacts between the two. Then the yellow wire would be used to tell the PCM that the key is in the start position so it knows to close the starter relay.

To be clear, I'm not knocking what you did, just making sure I am understanding all of this correctly.

You must be feeding key-on power to the PCM through the black wire ACC circuit. I have always thought I would use the blue wire IGN circuit and hadn't thought about using the ACC circuit for key-on power.

So what are you using the yellow S wire for?

MonkeyMadness said
And the idea of needing a starter switch while still using a key and key switch is just out of the question for me.

I understand that, I don't want a button either. Just tossing it out there.

Oh, and sorry about the F-Body ignition switch reference. I forgot your switch is in the dash.