How much of the OeM harness do you have?
Really you just need to tie the clutch and trans switch in parallel and replicate what is in post #6
Really you just need to tie the clutch and trans switch in parallel and replicate what is in post #6
As for code 67, that’s a bit trickier to solve. Mustangs we’re wired differently depending on the trans and ecu. That’s why I asked what ECU you were running.
It’s tied to pin 30, but it behaves differently depending on auto or manual
According to this schematic the Black/white ground goes to grey/yellow at connector C212