http://www.termpro.com/articles/noise.html got alternator whine, turn on/off thump, hissing, or suspect ground loop interference? check that article out. included are the 10 commandments of a noise-free install in addition to trouble-shooting hints. dont worry...its easy to comprehend and not overly-technical. hope this helps someone...cause i have all the issues except ignition noise going to use this guide to fix em. sticky?