I bought my s4 as a shell. Wiring was taken too. Recently i bought a full swap from a series 5. I have been searching how to wire it or what ever and all i find is keep your s4 parts and swap onto the s5 keg. I want to do a complete wiring swap and everything. What do i have to do? I stripped the interrior so messing with the wiring wont be that messy. Any help will do thanks!
This is all the wiring i have, what goes to the tail lights and some dash pannels.

 

If you have a complete s5 wire harness, dash harness, ecu, and cluster should be able to just drop it all in

 

Kind of like a plug and play? Its all suppose to be s5 parts right? Nothing from the s4 is interchangable?

 

The harness in the dash is by and large part of the front harness. The S4 front harness and S5 emission harness are not plug and play. The wires dealing w/the ECU are essentially part of the emission harness. Some of the wires coming out of the ECU plugs into the front harness. Thus you will need to make some alterations.

 

What about the harness coming from rear lights and stuff? So fron and engine harness all s5 and ecu too right? Sounds easy lol