Door speakers not working

[DWooten]

I went to add an amp with the PAC LPHGM72 loop harness and alpine 445u amp to help make the new speakers sound better.  After install I heard some static in the dash speakers so disconnected immediately.  I put everything back the way it was and now I have no sound coming from the door speakers. All other speakers work just fine.  This is a non bose 8 inch radio.  Does anyone know how the front dash speakers and door speakers are ran to assist in starting the troubleshooting.

Thanks

[andrewb24]

did you have to cut and splice any wiring? find a wire diagram for your radio and see what color wire is for the door speakers then trace it down where you cut and spliced and make sure there is a good connection.