yep as wraith said, most pioneer radios dont have an antenna signal wire, just a remote wire for Subs, .. its been a problem for ages with pioneer radios, if there isnt a special dedicated wire for the antenna, you might just have to connect a switch to the wire somehow so you can manually turn it on and off (Thats what i did with mine, 2 switches 1 for the sub and other for antenna).. As far as i know there isnt an option in the radios settings either to disable it.. Its just the way the radios been made
and as you say in post #3 that you dont care for the antenna, just disconnect or cut the remote/antenna wire and it should stop it .. if your radios anything like mine it should be a blue wire with a grey/white trace on it.. and it has a weird sorta female plug thing on the end of it
If all else fails just take out the stone guard under the panel, find the wires for the antenna and go crazy with some pliers!!! haah
See how ya go man..