Does anyone know what the speaker wiring color codes are for the stock 05 F150 6disc non audiophile headunit are? I took my truck to audio express to get new speakers, subs, and amps installed, and now when I try to adjust the balance left there is no sound. If I leave it in the middle balance setting all the speakers have sound, or if I adjust the balance right the right side speakers have sound. I just can't isolate the left side only. The fader works fine though. I refuse to take it back again since I had to take it back twice already to get them to wire the amps correctly and route the wiring. I just don't trust them anymore after their past mistakes. Thanks for any help!