My brain is frazzled. I've been trying to match up the wiring from the focus ecu plug to the fiesta loom. I have no real way of knowing what I'm doing. The only method I have is to simply match up the colours, but I have lots of duplicate colours.
There's a few black/yellow wires and a few white wires on the focus plug and fiesta loom. No idea what any of them are for or whether i can get them wired up wrong. I'm so confused right now. Please help 😕