i have an 03 sedan without sat ready, and today i took out the radio to install a fm modulator for my sirius satellite radio, but after i took out the radio...i cant seem the find the antenna plug? is it that two prong one on the back of the radio? i was expecting a one prong plug like every other car that i've taken the radio out of has...which is what my fm modulator uses

im stuck...any suggestion?

 

The OEM radio uses a diversity antenna setup, which means it has two antennas. The radio chooses which one to receive signal from from one moment to another based on signal strength. In practice, the diversity setup goes a long way toward solving multipath fade and distortion problems that dominate FM in suburban/city locations.

So you will need to find a suitable adapter that lets you tap one of the antennas for the FM modulator - which, by the way, provides the lowest fidelity of sound quality available. Is that OK with you?

 

what are my options? is there an aux input on the oem head unit? (it doesnt have a SAT button)

 

I think your option will be to get a wireless FM transmitter or get a used HU with the SAT button.

 

I would even consider a cassette adapter before FM modulator. You could probably route the wire internal to the HU and just leave the adapter in place semi-permanently.