I installed an aftermarket deck in my girlfriends 03 Aztek. I installed it the stupid way by cutting off the old harness and hardwiring the deck into the existing wires instead of buying a harness that plugged into the existing one. Everything is working aside from the speakers. I have no sound. If I hook the deck up to a constant power source I get sound by turning the deck off and then on again. I figure this is because it is causing a short in the factory amp and allowing the aftermarket to take over. This is obviously not a possibility as I will likely burn out the new decks amp and it will seriously murder the battery life on my car. I have found 2 possible locations for the factory amp (under the drivers side dash next to the steering column or in the back near some speakers that apparently don't exist on my model) but the amp isn't in either location. Has anyone experiences this issue or know how to resolve it?