As topic any wiring diagrams about? ideally need pinouts on ECU ( for a N plate fiesta )

How does PATS work, does it cut fuel pump? what else?

Got an IGN live from fuse box into inertia switch (Black/red) Then, got a BROWN wire coming out of inertia switch, does it go into ECU or does it go direct to pump? only we are unsure if the PATS is up the creek or the aftermarket immob... There isnt continuity between inertia switch and pump


Thanks all