The aim was to keep it looking as OEM as possible by fitting everything into the fiesta exactly as it was in the puma. which meant no joins in the wiring or cable ties holding things together etc

​​The only alteration made to the loom was for the front fog lights, as puma's don't come with front fogs I removed the fog light wiring from the old fiesta loom and added it into the new loom. I then just needed to add a fuse and relay into the new fuse box.

A bit unusual for this conversion was the ECU I used. The most commonly used is the TAPE ecu. This is popular as the frp map is transferable to it and only runs using 1x lambda sensor. I however used the DIVE ecu, mainly because it was what came with the puma I had as a donor. The downside to this is that this needs a pre cat and after cat lambda sensor. Which meant I also needed to re use the puma manifold as the fiesta part would be no good. On the good side, this ecu works with all the diagnostic checks so I can read the codes etc if I need to.