The right front speaker in my 04 FX4 SC cuts in and out and the rear speakers do not work.I thought the factory HU was bad, but after I replaced it with a new JVC unit I still have the same problem. Can anyone tell me where I might find any harness connection points. I am hoping to find a loose connection in the harness, just trying to find out where the harness runs. Thanks for your assistance

 

I did change the speakers, I'll recheck the connections.

 

Thanks for the info,I'll check it this weekend, it's cold outside.

 

CRaz3d,
Thanks for the suggestion, You were right. The cheap adapters I picked up at Best Buy had either broken apart or just wouldn't make a good connection. I got rid of them and soldered the connection. Thanks again