If the harness doesn't work it sounds like you have either the stereo that was from a car that has a factory amp, or you have the factory amp.
My understanding is that there should be the Non amp Toyota wiring in with the amp wiring.
http://crutchfield.custhelp.com/cgi...F9zZWFyY2hfdGV4dD1jYW1yeQ**&p_li=&p_topview=1
My understanding is that there should be the Non amp Toyota wiring in with the amp wiring.
http://crutchfield.custhelp.com/cgi...F9zZWFyY2hfdGV4dD1jYW1yeQ**&p_li=&p_topview=1