Why does my rear subwoofer only work when it's freezing or below outside? I have an 03 Cadillac Seville without the Bose audio, and my center rear subwoofer only works when the car is freezing or below, if it's been sitting outside a couple hours and it's about 1c outside or colder, then the subwoofer works for the whole time that the car is on until I turn off the car after it's been warmed up. If I turn it on and the sub works, let it run for a few minutes and let the engine heat up, turn off the car and turn it back on again, the subwoofer will not work. This has got me so damn confused and I almost care about know why it does this more than actually getting it fixed.