Hi,

I've done a loom or two over the years but unfortunately I just don't have anytime to do any more. I don't get much time to do anything anymore.


The best tip I can give you is to do one circuit at a time.

I.e.
Injectors are one common switched 12v and four earths to the ecu.
Coil is another switched 12v and two earths to the ecu.

And so on