hooked up my zumo 550 loaded a music card but when i play through the aux i get engine whine through the sound system my ipod plays fine i used a direct line for power to the gps, i have read about a isolater will this solve my problem. tp

there are several types of filters on the market that will plug directly into the power plug --- take a look and see what you think will work best for you or you can call the guys at Totally Wings and see what they recomend

thanks will give them a try