Rear speakers not working

[expy2014]

I just installed a new head unit in my 2014 XLT now my rear speakers do not play but i know they work, when i jump the wires with a test light shown below they work.
But if a hard jump them they do not… Im so confused, so any help is appreciated!
Something to due with the rear being stuck in “headphone” mode i believe.

 

[GAINMOB]

try different wiring harness...i love to use crutchfield.com

 

[Yupster Dog]

Second Crutchfield, anytime I call them they are very helpful and knowledgeable about what you can and cant do with your system.