I have a 2002 Pontiac Grand Prix SE with a ton of bells and whistles. It didn't come with the Bose Sound system but did come with the Monsoon (Or something to that effect) System from the factory. Now that the radio is MIA (not there when I bought the car) The Power Driver Seat, Power Locks, and Such don't work unless the car is ON. The switches are good, fuses are good, and relays are good (this was an easy test as I borrowed a friend's GM/Delco Radio from his 2001 GP). Now once I turn the car OFF open a door, and hit the lock switch. It jus' clicks, sets the alarm, and off we go, BUT ONE PROBLEM! It's not locking the doors!! When I had the Factory Head Unit in the car everything worked like it should. This is nutz if I have to go back to the factory stereo in this car. Any help or suggestions? OH ONE OTHER THING! I hooked up the yellow to the yellow wire on the aftermarket harness and my Aftermarket stereo won't work and neither will the locks, seats, etc. HELP! I don't have in the upwards of $100+ to replace the factory head unit!