can you be more specific on what wiring diagram you need or what you are trying to do exactly? What year of tacoma do you have, does it have the JBL audio system?
My double cab with JBL audio came with a factory subwoofer but I thought the JBL audio was only available with double cabs .
Anyways almost all wiring diagrams can be found at http://www.ncttora.com/fsm/. but you won't find the diagrams for any tacoma newer than 2008 (when they put new Head units in and added the aux input, etc). If your truck is 2009 or newer let me know and I can get you the audio wiring diagram, just clarify if its JBL or not.