Stereo Noise Fixed! Thanks

[TMein@aol.com]

To all who responded and to those who need help: Had previous engine noise
feedback in car stereo. System is head unit/preamp out to passive eq to cargo
area w/very long RCA cables to amp. I had the annoying whine that increased
with throttle opening and if lights/defrost were on.  

First suggestion from list was to improve grounding location. Got extreme on
this one and grounded head unit to the ENGINE BLOCK. Result? No change. 

Finally, yesterday, went to Radio Shack at advice of many, and purchased a
GROUND LOOP ISOLATOR. $14.99. This hooks up between RCA patch cables. Well,
tried it up front, between deck and EQ. Sadly, no change. Then tried it in
back between one set of RCA's to amp at the amp. IT WORKS LIKE A CHARM!
Unbelievable. No whine. Seems like the sound is cleaner, too. Such a simple
install, to boot.

Thanks all!
Tmein; '89 200TQW in need of car reg ($304), trip odometer, rear washer
switch, temp gauge/sender, etc, but I still love it anyway!