You can refer to your service manual from here:
https://wranglertjforum.com/threads...ice-manuals-fsm-technical-documentation.4618/
More specifically, the PDF for your model year here:
https://wranglertjforum.com/attachments/2004-tj-service-manual-pdf.14043/
The wiring starts on page 607/8W-01-1
The wiring is labeled as XX/XX where the first color is the primary, and the second is the tracer color (a thinner stripe)
If you are able to, upload a picture of the wire and its location for me to better understand where it is located and its color/tracer setup.
I suggest reading through the 8W section to familiarize yourself with the wiring of your Jeep. If you hit a snag or need help understanding the wiring diagrams, it is all explained on pages 608-612 (8W-01-01 - 8W-01-06) But feel free to ask me for any further explanations if they are too confusing.
With all that out of the way, heres a few I found while skimming the FSM for an 04.
The first one of concern would be a Black/Orange wire from the ignition switch to the fuse block for the Run position on page 637/8W-10-13
There is also a Yellow/Black wire for the Idle air control motor seen on page 695/8W-30-11