georgeb944

While I have the wiring diagrams for all of the C5 cars, a complete wiring diagram would take a gigabyte of data, and would be unwieldy over the internet.

Ask me for a specific page or two, and I might be able to assist.

bcsangerman

I think I’d only need the pages corresponding to the TCU pins, to know which wire is what color and going to which pin #

georgeb944

Here you go... Good luck...

bcsangerman

Thank you. I have an S6. Are the A6 and S6 the same?
If so, would an RS6 plug wiring harness be the same?

georgeb944

probably. There is no specific diagram for am s6

bcsangerman

great! Thanks for the help and quick replies.

now I just need a lesson on how to read this. Ha

georgeb944

An article I saved from many years ago...

bcsangerman

Thank you. Before I continue diving in here, does the TCU wiring diagram you sent illustrate the TCU pin/terminal numbers, the layout of the pins and the corresponding wire color for each pin?

Basically, I need to replace the TCU plug/connector and want to make sure I am inserting the correct wire to its correct terminal on TCU plug/connector.

georgeb944

All but the layout. You'll have to figure that out. The numbering is on the connector (although very small and hard to read.)

no.radar

While I can be of no help on all this, as the father of an S6 owner, just wanted to say the request for help and responses here certainly demonstrate the character and value of this forum.

Best of luck, Sangerman!

(You've probably reviewed this before, but just in case, this YouTube video while not addressing your specigfic issue, might be of some help in figuring. out wiring.)