[mikegett]

No, two relays are still needed for the radio. The alarm module is turning on and off 12volts constant. Since the 12volts latches with the first signal and unlatches with the second two relays would be needed to hold the power latched and then to close it. Otherwise, the alarm button would only work on the first press.
The alarm module has the relay built into it. If you are looking for a external relay like aftermarket alarms ( with plug in relays) you won't find it. They are surface mounted onto the pcb boards. What I don't know is where it is located in our cars. My ford and honda were located in the trunk, but I wouldn't be suprised to find out that it is built into the ECU or piggy backing near bye. I believe that every alero came standard with it in 2003 and would make a extnernal alarm costly. In reality, it doesn't matter where it is. As long as you know where the signal is going. But, as stated previous motors would not be a wise choice for the alarm button.