after market radio prob
 

bought a pioneer headunit for my car and had a couple friends of mine
handle installing it.theyve done this for me in the past and i havent
had a prob...but this time the headunit will not recieve anything but
static for AM. Fm cd and all its other features i use work fine; just
the am is all static. manufacturers warranty is void if its installed
by "your buddies" it seems. anyone have any troubleshooting tips....