So I drive a 2002 dodge dakota quad cab, with a pioneer MVH-X360BT stereo, I decided to replace all four stock speakers in my doors because the were blown up front and not working at all in the back. I installed JBL GX628 speakers all around. I made sure that they would work and that I had enough power for them to work. After installing them, the front two sounded amazing and worked perfectly, but I'm still not getting any sound at all from the rear two speakers, any ideas?