92 124 stereo head/amplifier to aftermarket
 

I did several searches and did not find and posts for my question. If anyone knows of info already available please direct me to it.

I am attempting to replace the stereo head unit (dash) with an aftermarket stereo. I want to run speakers and antenna control back to trunk pick up the outputs from the amplifier and run antenna signal up to new stereo. The original amplifier will no longer be used.

Has anyone done this? Is there any wiring schematics available which would help me avoid a lengthy and frustrating endeavor.

Any information provided is more than I presentlly have and will be much appreciated.