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Hey everyone, currently doig a REW swap on my FC everything is done but the wiring.
I have the PFC for a FD and the patch harness for FC-FD. Im having trouble with the wiring. I have both harnesses i dont know which to use and what connectors to use, I would really appreciate the help thank you!
Banzai Racing's adapter patch harnesses are for using a PFC with a FC's emission harness, not intended for transplanting a REW into a FC.
I believe you would be better off by using the FD emission harness instead of 'upgrading' the FC one.
Thankfully, the S4 is pretty straightforward with this. When I did the Haltech in my car, all it's harness needed was power and ground. Everything was self-contained in it.
My suggestion is to get the FD and FC wiring diagrams and 'map out' both harnesses to get a better idea of where you are and want to go. With the right approach, it'll look like a factory wiring job.
