Help jbl radio

Input a jbl radio from a 2017 limited tacoma in my 2016 sr5 and only is working the front speakers and no volumen level in the radio and no rear speaker.

 

Does you 2016 have jbl also?

 

If your truck didn't come with the JBL system, then any JBL radio most likely won't work with your truck.

 

Definitely correct, if your truck did not come with a JBL unit then I am surprised you even got the front speakers to work. Without going into to much detail, it will require a lot of work and extra parts to make that radio compatible with your truck.