No sound from my car amp, wired up right won't come on

Installed my Audiobahn A2300HCX amp to my kenwood head unit. Just got this amp off ebay, ran all my wires for my amp. Finally it was time to hear it BUMP, but nothing... As i calmed down form woundering bout if i got ripped off on ebay, i recheck all my wires, reground the wire to an other spot, check my fuse on amp, and inline fuse from power wire off battery, AGAIN NOTHING.......... FINALLY had an idea bout jumping a wire from the power terminal (off the amp) to the remote terminal (off the amp), AND BOOOOM my amp kicked on... TURNS out it was my remote wire off the head unit off the harness was bad never hooked up an amp to it before. BUT dont leave it that way the amp will stay on all the time i only did it to see if it works. THANK GOD IT WASNT THE AMP