bought a boss audio 625UAB head unit, initially had it in my '99 sunfire; sold the '99 and bought the '03. the '03 came with a Kenwood KDC-138. pulled the kenwood and swapped it for the boss. however when i started the car, the radio did not work. checked the fuse box, no blown fuses (to my knowledge) so i put a voltmeter on the (what i presume to be) the power wire to the radio, even with the car running it is only getting a very small amount of voltage (the meter needle barely moves). i can post pictures of whats going on upon request. please help