HELP Engine noise/ground loop

[SethPhillips 5,000+ posts]

ok so all i did was move my ground for my 2 amp's and cap.. and now i have terrible engine noise... i moved the ground EVERYWHERE!! tried new rca's the only thing that worked was a ground loop isolater

but now everytime i tun my headunit on my speakers pop really quick and i can here alt wine!!!!

please help

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[SethPhillips 5,000+ posts]

should i take my 3 run's of my RCA'S out and and run new shielded rca's????

how do i get rid of a ground loop??

 

[SethPhillips 5,000+ posts]

thanks for the help guy's... no really..

 

[Crzy 10+ year member]

get a ground loop isolator from wal mart for 10 bucks solved my problems

 

[jmoreno150 10+ year member]

LOL no replies huh. isolators work somewhat. check ur ground points with ur DMM multimeter if it read 0.1....... or whatever thats a good ground point if it read 1.0..... bad point. whereever u find that point sand the paint off and and clean with alcohol or something. then use a star washer and bolt that ***** down.. are you grounding the amps seperately? if so where are they grounded to? i like to use a ground distrobution block if i have 2 amps or better.

 

[SethPhillips 5,000+ posts]

ok i have my sub amp, cap, and 4 ch amp grounded together.

by the way i am a certified M.E.C.P. installer ijust am brain dead on this one......

ive tried new rca's new headunit its GOT TO BE THE GROUND. i have yet to check it with my DVOM.

here are the symptom's

with ignition on car NOT running. my speakers sound like im amplifying static.

and they pop. when i turn up the sound it sound's like its clipping.

with the car RUNNING. bad bad alt wine!!!!! and all the other stuff i mentiond

i have tried other grounding points and have gottin the same thing!!!! but like i said i have yet to messure my refrance with a dvom

do i take my neg. lead to the batt neg and test my ground with the pos. lead??

thanks