Hello all and thank you in advance. This is my problem I have a 2007 Chrysler Aspen had factory Alpine / NAV and I installed the AppRadio 3 all went well accept I get a popping sound through the speakers when I turn the car on (only). But if I turn the key to ACC and wait 2-3 seconds and then turn the car on, no popping sound every time. Crutchfield said they have heard of this on Fords but not Chrysler and told me to try a better ground. Any ideas?