My question is did you put in after market radio?
If you did, putting in the adapter from small to big is the issue. I installed new radio, put in the antenna adapter and lost most of my easy to get local stations. I then went and just bought me hidden power antenna and started getting better reception. My problem now is the antenna is in the best spot I can get due to the electronics and that the wire is too short to reach my back window. Thus I bought a extension cable of 8 ft which should not push it to the back. And it being a booster antenna, should work fine with the extra break in the line. Good luck. hope that information helps.