I have two amplifiers in my Jeep Wrangler. The bigger one powers the back speakers and the sub. The smaller one powers my two front speakers (Boston Acoustics). When I turn my car on it is a crapshoot as to whether the front speakers will come on or not. My friend told me that it looks like the amplifier is not turning on. >We tried switching amps but the same problem occurred. I don't know what to do, can anyone help?