Right, on my last dodge (with the infinity speakers) you have to hook the pwr antenna lead up to the speakers, this provides the built in amp in each speaker with power.
But what we are talking about are the stock head units, they seem to lose one side or the other, I haven't done any trouble shooting. But I notice my right front comes back on when I hit a bump (tweeter) so I assume its a connection problem, but I don't know for sure, since my left doesn't work at all.