power antenna wiring
 

I've searched all over this site, but can't find what I need.

The previous owner my 97 GSt had a number of things installed by someone who apparently can't read instrutions. One of them happens to be the power antenna. She replaced the fatory unit with a metra roadworks unit, but did not connect the power motor (up/down). does anyone know which wires I need to connect to for the unit to power up and down with the factory infinity stereo?