I installed a new to me headunit, pioneer deh 340 that i got from a friend. I wired everything right, matched it up and everything and the speakers work, and my subs work. How ever after i disconnected it so i could finish installing everything and when i reconnected it the volume knob wouldn't work anymore. It worked when i first connected it, and now it doesn't. However when i use the remote control for it, it will turn up and down the volume. This is the only thing thats not working, but it did work before. Could i have messed up the wiring or something, or just broken the knob. Its not that big of a deal, i'm just wondering.