He isn't using the pdc at all for the fuel pump or the asd. That wiring really needs to be straightened out. That block off wires in your pic is an accident waiting to happen. The 12 volt supply makes no sense if it is a stock controller. You need to pull it and try and find id numbers on it. I can help wire around it but if that is a stock controller for a mustang it has to have failed to have power on a ground or you are not reading the right pin on the connector.
I agree, the wiring does need to be straightened out,
that's more of a long term goal,
Because of how much work it will take.
I pretty much need to redo all the wiring harnesses,
or at least 90% of them.
also if you look at the wiring terminal i put up behind the battery,
you'll see that the Green wire with a black stripe,
which is the hot wire to the fuel,
goes straight down, very snug against the firewall.
It was guitar string tight before- about three terminals in.
so I moved it all the way to the right just to get it at a straight length with minimal slack.
but wire 19.5 has a bundle of extra wire tied up in case i need more length....
when I pull the battery next time I'll show you the nest underneath it,
He crossed two harness's together and left all the extras just hanging.
but back to the topic-
what do i need to pull to find ID numbers?