Hi i install android unit with interface AX-GMLAN11-SWC for cobalt 2010 pioneer system the rear speakers and subwoofer not working i install all wiring i contact metra he tell me this

Thank you for reaching out to us. Make sure the rear audio wired are connected to the rear wire on the main harness connected to the vehicle. the rear wires on the 16 pin wont be used. I not understand what meaning

 

do you have a pic of the harness? it sounds like there may be 2 locations labeled for speakers and you may have used the "wrong" one

for a 2010 the speakers for front and rear should be on the same connector so look at the connector that you have your front speakers wired to for rear speaker wires

 

yes i am sure all connect

 

thanks i found the wire for connect rear speakers not connect with 16 pin like front speakers
the connect with Vehicle harness green and green black wire for left speaker and purple and purple black for right speaker